My question to you still remains the same...where do your particular beliefs come from? If, for example, your current beliefs are predicated on science or scientific theory? I would reply to you that I have absolutely no problem with science and it's theories. My one and only simplistic question would be to ask you where did science come from? And just to let you know where I'm going with this. I'll ask a rhetorical question about the creation of the universe. If you suggest that the universe began with a "big bang" my reply to you would be...where did the big bang come from...?
Science is not able to explain everything. It has never been used for that purpose. It breaks up into many smaller areas of study in order to focus on specifics and provide best explanations. I do not know what, or if anything came prior to the Big Bang. I suspect that my brain would be unable to regress infinitely - because what would be the point? I would ask the same thing of god believers: what, who created the god? Again, not knowing is acceptable, and honest. Claiming to know, and claiming to have the answer in a god is dishonest and arrogant (you made no such claim.)
If one's brain simply cannot fathom the endless question of where everything came from, that is not the trigger to go full god mode and claim that there must have been an "uncaused cause" as William Craig likes to claim. Perhaps it is true that there must be an uncaused cause, but that does not mean it was a god, or even a creator. It is merely a philosophical hypothesis.
I don't like to describe myself as having beliefs, although I admit that it is the best word to describe one's positions on these types of issues. I enjoy the sciences, and I benefit from the amazing work that so many scientists have done over time to get us to this point in time. I freely admit that even some of our strongest theories with explanations could be wrong. And I cannot think of a specific "wrong" that would shake up my world so much as a Christian discovering that Islam is true, and Jesus was a hoax.