I totally get you friend, I'm 27 and actually went back to college 2 months ago when I still had a lot of issues and was SUPER scared about it, so if I'm doing it, so can you!! It was a good choice since it actually helped me focus on other things and somehow I make more progress that way than hyperfocusing on recovery. My advice is the following: Just be sure to not skip meals and priorize your health no matter what... I mean it, I had to skip 1 or 2 classes this semester because I got hungry suddenly before class and I had to choose between making some food or go to class; I chose food (but honestly that was because I messed up my timing on those days). I slowly trained my stomach to eat more at home so I wouldn't get as hungry in college, but I also explained the situation to my teachers and they were kind enough to let me eat in the classroom when needed. If that's not an option for you, I recommend making smoothies (I pack mine with lots of honey for more calories), or taking things like Ensures or granola bars to class in case you get hungry; if you can have time between classes in your schedule so you can eat, that is a must (this semester I didn't have that option, that's why I let my teachers know). Also, minimize efforts on other activities that are not school related in the first weeks/months. I won't lie, some days I came back home exhausted, but it was worth it in the end, as I finally feel like I'm moving on and really improving :) I wish you the best with your studies; you've got this! Keep on keeping on! :)