Latebloomer and I just got asked out. Help.

So I have the type of AuDHD that makes it difficult for me to form connections. I'm neurotic and I scare easy. I'm prone to catastrophizing which leads to inaction which has led to being chronically single at 30 and I don't date. There have been offers here and there but there's always been something to get in the way (no mutual attraction, wrong location, wrong time, etc.)

So anyway I ran into this guy by happenstance who shared my interests and I was somehow miraculously mutually attracted and now he has my number. I don't know how this happened, I felt halfway possessed during the exchange tbh lmao. But now I'm falling into old habits where I blow everything out of proportion and ruminate "what if, what if, what if" far more than is appropriate. It's most likely that absolutely nothing will come of this at all, so i don't know how to handle it.