I'm going to attempt to answer my own questions one by one, in case anyone is reading this.
Why should I bother believing anything at all?
Because if you don't, you only arrive at nihilism and absurdism, which ultimately leads to insanity.
Why shouldn't I just do whatever seems right at any given time and deal with the consequences later and learn what I can as I go?
Why learn as you go when you have two millenia's worth of wisdom found in the Church?
What makes you think there is a God?
It's something I don't know with my brain but with my heart.
What makes you think Jesus is God?
It's something I don't know with my brain but with my heart.
Why is it not completely obvious that everything Orthodoxy preaches is true?
It is once you start practicing it. Quite the paradox.
Why are Orthodox so divided among themselves when they claim to have the "ONE true faith?"
We're not divided among ourselves about the things that matter. Which side you take in a church schism won't determine whether you get into heaven, though it certainly will lead to hell, maybe even right here on earth!
Why do you make the claim that you're right about everything to the exclusion of anyone who believes anything different?
That's impossible to answer because the question presupposes false things. Over in TAW is a thread about the book Christ the Eternal Tao, which I believe talks about Taoism finding its fulfillment in Christ, and I'm pretty sure Bl. Seraphim of Platina also talked about Buddhism finding its fulfillment in Christ. Of course ancient Hebrew religion found its fulfillment in Christ, and I think I've heard it said that every religion contains nuggets of truth (some closer to the Truth than others), so it's not like we're saying other religions are wrong about
everything. We have the exclusive ability to call ourselves the Church that Christ founded, though, so we
do have a claim on the Truth, since Christ is the Truth.