Squiggle,
Congratulations on your sobriety and clean time. Keep up the good work!
It's great that you've got such plans for yourself. Have you considered going part time? That's what I did when I started school. I had been out for years, was filled with anxiety and wasn't sure I could handle it, so, I took only one class to start with, just to get the hang of it. Then, two. Then, I went full time. I eased on into it, and it was the best thing I could have done, cuz, I was sure that I could do it. It made my anxiety much easier to handle.
I wish you lots of luck in your endeavors. You can do this, one step at a time.
Let us know how it goes. Oh, and don't forget to use student support services. They're great!
Shalom!