Pick a hobby or activity you enjoy and stick with it. You don’t have to ever be great at it per se, but having something you enjoy doing that you are at least set of good at really helps.

The bad news is you have to be consistent. The good news is that it just takes a little bit each day to get decent at something.

This next part may be a bit controversial, but I began taking martial arts (BJJ, but Judo, Tae Keon Do and boxing/kickboxing are legit too) really helped me because it empowered me. Knowing that you can defend yourself really helps even in non-physical situations, such as a negotiation or a conversation with your boss. I guess it becomes easier to stand up for yourself. You also learn that you don’t have to prove yourself to anyone.

Some sort of self-help/therapy is beneficial also.