I had my surgery after menopause and had great success with it. I was VERY committed, though - I followed my program to a "T".
be aware that as a "light weight", your weight loss will likely be pretty slow. Many of us start off quite a bit heavier than you are, and generally, the heavier you are, the faster the weight will come off - at least at first. Just saying this because a lot of people expect to drop like 30 or 40 lbs the first month after surgery, which I think comes from watching shows like "My 600 lb Life". For most "normal" WLS patients, that's not a realistic expectation - and that goes doubly for you since you're much lighter than most of us are starting out. Not trying to discourage you - if you're committed, you'll lose the weight - but just don't get discouraged if you're not having the huge drops that you may see in other people.
good luck with it - I'm really glad I did it and would do it again in a heart beat!