Being scared is 100% normal!!! The fact that you are starting early shows that you want this and seem to be ready!
I started at 320 pounds and was banded in 2009. I struggled with the band and now am having it removed on September 5th. I hope to get the approval for the sleeve for 6 weeks after the band removal.
Staying positive is the key to your success, no worries about the weight loss it will come!!!
Good luck and keep posting.
Angela