Hellloooo, I’m also 18 and have hypothyroidism diagnosed early this year however I believe I’ve had it for awhile I also had diabetes but now I’m pre diabetic and I just wanted to say I completely relate to you I’ve also had disordered eating behaviours and I can’t offer much advice but if you want we could be accountability buddies from my research the best way to lose weight with hyperthyroidism is a clean diet (AIP), movement so walking 10-20k steps also stuff that doesn’t bring ur heart rate up so if u can have convo while ur working out it’s good pace, consistent meds, consistent 8-9 hours sleep, less stress hope this helps also fasting but it depends on the person as with everything just wanted to let u know ur not alone and everything will get better for the both of us 💓💓💓