Conflicted/concerned

Hello all, I hope everyone is well. I recently downloaded this app yesterday morning and I have been tracking what I've eaten since. I don't necessarily want to lose weight except maybe in my chest area, and possibly gain so muscle. I'm a 17 yr old, afab trans man who is currently 185 lbs and 5'10. I have been a bit reluctant to download an app such as this because I have struggled with mental health and I am a bit nervous that I may spiral and pick up some not so great eating habits. I want to be healthy and not be out of breath after walking up the stairs at school, but I enjoy eating what I want when I want as well. idk what the point of the post was besides rambling but oh well ??