@Electron I study full time, I work full time, I do anarchist stuff some of the time.
Every Sunday I do precisely nothing. It's not a waste of my time. It's the time I have to rest and keep myself from going insane. I could work some more if I wanted, but burnout isn't fun.
Self care means fulfilling the needs of your body. If you don't fulfill your body's needs, it's going to not work right.
If you try to do all the things all the time, you'll end up not being able to do anything at all.