Well, change always presents some risk. How about focusing on your ability to deal with whatever might go wrong? Moves rarely happen without a hitch. Adjusting to a new living situation typically involves some things that are great, and some that are not so terrific.
You've done a lot of work to get yourself to this point. You've overcome obstacles (including the ones in your own head). This is just one more challenge. Life is full of them. You're stronger than you were before and you'll continue to grow. What is hard at first you can learn to deal with.
So start by putting these black-and-white notions aside. It won't all be great but it won't all be terrible, either. And in the long run, you'll wind up in a much better place than where you've been.