I'll second the advice to take up a sport or other physical activity. Easiest for me to get going with was 'body weight fitness' aka calisthenics, since all I needed was my apartment + youtube videos + time/practice.
It took me a while to turn it into a regular habit, but now the effect on my mood + energy is a night/day change. Wish I'd made this happen years ago.
A last tip on it: if it's un-fun, doesn't stick, etc. experiment, try variations, new activities—but keep going back to it. (Their seems to be some initial resistance that is partially psychological if you're just beginning to work out after a long time without; parts of you, maybe unconscious, may try to convince you to quit. Be understanding of that, but persistent in continuing (imo)).
It took me a while to turn it into a regular habit, but now the effect on my mood + energy is a night/day change. Wish I'd made this happen years ago.
A last tip on it: if it's un-fun, doesn't stick, etc. experiment, try variations, new activities—but keep going back to it. (Their seems to be some initial resistance that is partially psychological if you're just beginning to work out after a long time without; parts of you, maybe unconscious, may try to convince you to quit. Be understanding of that, but persistent in continuing (imo)).