@cris how is your appetite ? Your stress levels ?
Off the top of my head and expanding on some useful answers already posted...
Carve some "vital space" for yourself. Dedicate some time each day to do what you feel like doing. Be a little bit egoistic.
Get a girlfriend if you don't have one. If you have one, terminate your relationship if you feel/know it's not right for you.
Speak with sincerity. Don't bottle things up in your day to day.
Put yourself in situations where it's easy for you to belly laugh, be it with friends, family, toddlers...
Strike up casual conversations in your neighborhood/classes/general vicinity.
Make someone a little present, no matter how trifle.
The gist is to lean into a feeling of security that brings about self-expression. Or the other way round.
Think of a (good) king of old in his throne: benevolent, regal, prolific and round. A lover of the arts but also a protector of the people. Self-assured.
Maybe you tap into this energy as inspiration, you just have to recognise it in your daily life. Hope it helps.