First if all alot of people do t realise how isolating this job can really be how much it effects ever area of your life.

I can relate to your post so much, I want to give you a big hug.  I've been escorting 10 years this year and I feel like in a way I've gained so many experiences I'm grateful for because of it but I've also missed out on the normal side of things. The only time i dated someone outside the industry he became emotionally abusive. i struggle with freindships because at some stage escorting will inevitably become a problem or a fascination for people.  All this said I wouldn't change being an escort right now as I do truly love it and it is a part of me.

I struggle with depression and in the past an eating disorder  which added to the demands of this work can make it very complicated to maintain and do "normal relasionships".
 I'm in uni 32-40ishish hours a week this year as I decided a few years ago to come back after a useless first degree I hated when I was younger due to it being easier to escort. So now i either study or am in the lab all day, I horrifically underestimated how hard it would be to work and go full time study. I don't know anyone from my course really because I'm a bit older, I work evenings and weekends and cant relate,weekends are my escort time and only income so that's them out the window.

Sorry for the mild hijacking of this post! My only advice really as clearly I am not the best person to ask is to focus on what you do love about your self and your life. Your starting a new course so keep focused on this one that you DO want to do!
 If you want to gain friends I've found doing non time consuming and low pressure things that are in no way work related helps,in my old city I joined meditation and wine tasting classes  to get out and about. The meet up app is where I met my only friend is often a good place to start expanding from that "work work work"lifestyle. I have to be honest I'd be lost without that friend, I had gotten to a stage it would be weeks until I saw someone other than clients.
(I also find talking to other sex workers can be extremely helpful as they understand about so much)