>What is the truth?
I think therefore I am, the only truth available to you when you begin your journey to the truth, bro. It means that you can doubt everything, even that you exist, but can't doubt that you doubt, otherwise there would be no you doubting. So the "I", the subject, in this proposition "I think therefore I am", exists insofar as he thinks (since doubting is an activity implied by thinking).
> the trinity is never even mentioned in the bible
True, it's an explanatory concept created by the church in order to try and illustrate the three moments of the act of faith. I.e. faith in itself (the father), faith as a duality (the son) and faith as a trinity, or union of the opposites, which means faith as an event (the holy spirit). Remarkably, trinity is a concept you can find in the books of a famous semiotician, C.S. Peirce, who tries to describe signs as three in nature (so not just signifier-signified), even though to my knowledge he's not particularly religious and is trying to understand how signs, not eternal truths, work.
>Should I trust this shit?
You should trust your own findings. Or read the only true ontology that's ever been written, i.e. the Ethics by Spinoza. It won't give you the eternal truth in the form of propositions, but it'll help you find your own truths, your own way to god through the signs that constitute our dual world.
>Tell me your thoughts on god. Is this bullshit?
Pantheism isn't bullshit, in fact it's what Spinoza ends up with, Interestingly though, he refers to the Oneness as "God or Nature", Deus sive Natura, which leaves you wonder.
There is a One, there is also duality, and there is also a trinity, or tierceity, to use Peirce's expression.
The difficulty when you seek truth is that you seek a proposition, as in "Truth is X". In fact, truth is an event, a tierceity, or a substance that we can perceive by making sense of the signs that define our existence as bodies and minds, as Spinoza explains.