I am glad most of the problems I mentioned are not an issue for you.
I think Water Fast will defintiely help you. After that one week stay on raw plant based diet and you will see the difference it makes in your life. You will se things differently, feel different, your cognition will improve and you will maitnain or lose more weight. Stay away from all junk foods and you should be ok. Another way to maitian weight is to walk everyday, which you do.
Yes, keep us posted. A good thing you are starting at a young age.