I'm a young autistic man, and I had my own atheist phase. My primary reason was that I'd never been presented with what I thought was a good reason to believe. I ended up jumping back towards the faith after watching a Frank Turek (I think) video where he presented some argument for Christianity. If you're looking for ways to have a helpful, charitable conversation about reasons to believe, I strongly recommend Trent Horn's book Answering Atheism.