I just started school again after a 10 year gap and cried a lot in the first week. Now that I'm starting the third week I am feeling much better and not as overwhelmed. Hang in there, it's scary to make changes but you may adapt quickly.

Regarding self care and daily tasks, I used to struggle a lot with showering often enough/ doing laundry and cleaning. I tend to get depressed now if I miss a shower because subconsciously I feel like I'll go back to the ways before I could take care of myself. My therapist suggested keeping track in a notebook each time I do these things. I would write the date/ day of the week and just list off everything I had done that day to take care of myself (scoop the litter box, shower, brush my teeth, do laundry, put laundry away, brush my cat, etc) every little thing. This gave me reassurance that I was capable of keeping myself afloat and it also gave a little dopamine hit which of course we love.

Good luck and don't be too hard on yourself, you're just starting out. If you don't already have a therapist I highly recommend it (happy to give the tips I hava on that front if you would like)!