What exactly do I do?

So I've posted on a similar subreddit a bit for the last 2 days and if you can tell, I'm in a really rough spot. I don't know if God will use me, I've had horrible dreams that I can remember clearly that just discourage me, some people told me that they're just dreams but they've been consistent with each other, all about the same thing.

I don't know if it's religious OCD or God letting me know about my future, which I doubt because why would He show me something that discouraging? It only led me to sin and I got so depressed for a while

I don't feel convicted or bad I guess but I still hesitate to commit sin. I can't ask God for a sign because it's wrong, I no longer want to lust, etc. What exactly do I pray about and what part should I read from the Bible?