Sounds like you are doing an awesome job so far. As far as stimulants, there is definitely a period of time when appetite is curbed. For me it lasted 9-12 months, but now I’ve been on Adderall for 2.5 years, and I no longer feel like my appetite is suppressed.
I am inattentive type as well, and my ADHD was not diagnosed until my late 30’s. From my own experience, I wish I had been diagnosed earlier. I did OK in school, honors/AP classes and such, but I was primarily coasting on my intelligence and ability to test well. Medication would have been a game changer for me in Middle and High School, and I would have done so much better.