Thank you for your detailed explanation of the recovery process, and I concede you are more knowledgeable than me on this subject. My advice anywhere in this forum is definitely not intended for people recovering from eating disorders.
As you said, it’s really up to @wipegreaser to decide what his situation is. If he feels at risk of ED-related behavior, he should probably follow your advice. If he doesn’t feel that fits him, then he should hit the gym. Honestly, when I was 18, I think that’s about the best advice anyone could have given me, because carrying a little muscle really does help out the social life.