To begin the process of seeking any literal "God", only bad reasons are available to humans.

re:

 "There are a great many people who claim to have used it (a Christian Bible) to come to know him, and you can test it by using it to try to come to know him.

"Why should I use Pimselur to learn Japanese?"

"Because I used it and 100 others used it and we all said it works"

"But there are some who used it and said it didn't work."

"Fine, it's still reasonable to try it out and if you find it doesn't work, don't use that method"

same for the bible and knowing God."

----
[Note: words in CAPS are not meant as yelling; just only for emphasis]

Re: "test it by trying it"

What reason do they have to begin that process?

Reasons acquired part-way-into the process
aren't the same as reasons to begin.
 

Meanwhile, ...

There are many people who say the same thing about the Quran,

The same basic claim
is made also by Hindu, about their texts. 

and by Mormons, about
the Book of Mormon,

and by JWs, about
the New World Translation (in conjunction with Watchtower and Awake magazines, while led in personal study with Jehovah Witnesses),

and
Catholic literature + attendance and study with Catholics, on the premise that "God" never meant for Christians (nor "seekers") to rely on Sola Scriptura (Bible alone), and that they are ~the one true Church~ whom the true "God" works through.

-and by
TENS OF THOUSANDS of rival (mutually exclusive) Christian sects, and even more rival (mutually exclusive) independents.

THAT really, really, really does
disprove your claim.

Besides there being zero objectively rational reason for anyone to say "I should seek a God", ...

 There is also zero reason for anyone say "I should use a Bible to seek a God".

The path/method you have said we should have confidence in because of it being shown/demonstrated to work (by countless testimonies) is actually the very thing which proves ~that path~ to be utterly unreliable.

THAT is what countless rival-version "Christians" attest to.

They are living, breathing proof ... that the methodology is utterly unreliable, as a path to any truth.


How could you have just not noticed that?

Meanwhile:

It is not
AT ALL
like someone saying "I used (specific program) to learn Japanese. Therefor, this demonstrates that you too could learn Japanese that same way". 

Japanese people, the country of Japan, and other Japanese-language-speakers factually exist.

Specific literal deities are not ~known~ to not-yet-converts to exist.

You can claim they do exist, and are subjectively/experientially known to exist.

However:

Such a subjective claim to experiential knowledge would come AFTER a person has been immersed in a given religious cultural program for a while.

-And would end up being entirely defined by:
 whichever random religious program the surrendering-person submitted to.

Meanwhile, we shouldn't get ahead of our self.

The topic is still:

Why anyone should begin that journey; before they acquire that alleged experiential knowledge.


Before opening a bible, or listening to any rival faction's sales-pitch, ...

There's no objectively logical reason, nor moral reason
for anyone to ~assume~ any gods exist,

nor to ~assume~ any ~specific~ "God" exists; even if they do exist. 

-nor to ~assume~ any g/Gods are playing a High Stakes Game of Hide and Seek; where someone's (anyone's) eternal fate hangs in the balance.

-nor to ~assume~ the claims of Christians should be given more credence than the claims of Muslims, Hindus, etc..

So while good reasons to learn Japanese
are self-evident, ...
good reasons to ~seek hidden deities~ (in general; or any specific "God(s"))...
are not self-evident.

Before starting the process, the would-be student of a language pre-knows they are learning the words of an existing people.

Before starting the process, the would-be student of a bible
does NOT already know that they are (as you alleged) learning the words of an existing deity. 

 
---

If anyone says "Well, it will become evident sometime after you being to study it" ...

They're not only ignoring all evidence to the contrary ...

they are also evading the initial point.

There's no objectively reasonable reason to begin.

So someone needs a crap reason to begin.

But even then, ...

There's no objectively reasonable reason to go the Bible-route, except to say :

"Well, since the pressure I'm under to "seek" is pressure only being exerted by a specific faction of Christianity, ...
it made the most sense to assume their premise, and then to follow their path";

-which is another way of saying "I let randomly biased humans decide that for me".
----

People who claim good reasons to *~seek hidden spiritual truths~ pertaining to hidden d/Deity(ies)
(*ironically, the literal definition if "occult")
are only saying that because the idea of it was planted into their psyche by other fallible humans.

They are, in other words, seeking purely to ~confirm a bias~

(an implanted bias; implanted by fallible people; not by any god;

- A "God" whom, according to believers, just couldn't be bothered to do that himself; nor to protect anyone from being "led astray" by rival implantations).

Meanwhile, ...

In nearly all cases (at least, when it comes to Abraham theisms),
the "seeker" is surrendering to:
dire fears
based on:
dire threat of violence
at the hands of:
a "GOD";
- if they don't play that game with him.

They don't realize they're the target of a literal Protection Racket/extorsion.

The offer of equally extreme rewards ... doesn't negate this point.

Dictionaries are not vague about this.

It is extorsion.

This an objective fact, not an opinion;

-EVEN IF a "God" is running ONE OF those extorsion schemes, to compete (badly) against:
countless groups of humans running their own version of it.

Meanwhile, all of that ...
is based on what?

Nothing but unsubstantiated rumors.

-Rumors about that what everyone is "supposed to be doing".

What do they say we should all be doing?

Seeking out even more unsubstantiated rumors (called "holy texts");
- but ONLY a randomly-specific collection of god-rumors;

- whichever collection the random thought-implanters suggest as "the true book"
- "lest ye be led astray".

Just as importantly, that "book" (whichever book) must be "explained" by fallible humans, so that the "correct understandings" can be gleaned; "lest ye be led astray".

-although the student will be told to credit that randomly chosen fallible teacher's "guidance" to a "GOD";

- so they can pretend they are basing their understandings OF (that) GOD on:
guidance coming personally FROM (that) GOD";
even though it absolutely isn't.