Welcome chaosbutterfly! I'm so glad you reached out for help. I hope you'll be comforted by being here & the fear will begin to go away. It's far scarier to continue down the path you were on.
In spite of feeling scared, you sound excited about getting started with a new life. I got sober using just SR - after more than 25 yrs. of heavy drinking. I was really jittery at first, and sorry for myself - but reading all the positive posts here took my mind off my problems & eased my anxiety.
Congratulations on your decision! Please let us hear more from you.