You will have to determine for yourself what is true and what is reasonable to believe based on what you consider to be good evidence.
The *best reason* to believe in a theistic God is the Messengers sent by that God.
Then there is no good reason. The "messengers" wrote a page of completely wrong science. Failed to give one single piece of future medical knowledge or technology which could have saved millions from suffering. Failed to demonstrate in any way that this is a God and can give us scientific, philosophical, accurate future information, give super powers to the messenger (as older religious text ALWAYS say), method for all nations to unite. By demonstrating godly powers in that age people may have been convinced and actually tried to take this seriously.
Instead it looks exactly like how a man who was not being honest but was a good writer would look. Does this deity find it funny to leave people either baffled or completely uninterested as the billions of Muslims, Christians and other religious people are? Or is he just a really bad dude?
A man who writes a bunch of platitudes, worship language and bad science is not a messenger of any God.
And the evidence for a theistic God still remains zero.
A
'messenger" isn't evidence for a God EVEN IF HE HAD GOOD MESSAGES. If he wrote really compelling material and you wonder how he did it, the answer isn't "we don't know so therefore it must be supernatural". That isn't how evidence works. He could be a genius? The text could strike you as exceptional. None of that means supernatural.
But the text is not great. Not at all.
Evidence for a theistic God is a theistic God intervening in the world. There is no evidence. People being gullible and not demanding good evidence is not good evidence.