How do people have the energy to like, work a whole bunch of hours every day (I usually assume 8 cause that's what most people work I guess) and also do side projects and *also* manage to like, read books and play video games and stuff.

If I work like, one to three hours in a day I just feel completely drained for the rest of the day, and if I manage to work multiple days in a row and have responsibilities and stuff I just kinda... shut down.

Serious question. I want to know how people do this because I have no energy for anything but so many things I want to do.