The best thing I ever did for myself in my life was to stop caring about what people thought of what I did in any part of my life.
I'm now in my 40s, I wear crazy leggings and dungarees despite not being young or slim and I don't care, I've dyed my hair various colours, I love watching cartoons of all kinds, DH and I have both started painting Warhammer models together, I enjoy YA fiction (especially vampire/supernatural/horror stories), I game, I play Pokémon Go and even manage our local group for it (which is almost all adults nowadays anyway), I collect rubber duckies and unicorn stuff, I love colouring in, I took up pole dancing at one point (and I will be going back when health issues mean I can), and my home decor is probably called eclectic at best. On my living room window sill you'll find a mixture of ornaments, Wade dishes, a dinosaur plant holder, a Toy Story alien plant pot and a crocheted Totoro, for example.
Life is too short to not do stuff that makes you happy. Ok, money/time/location may hold you back from some things, and I will say I don't always do everything I've listed, but there's always something else to find that will bring you joy and it's worth giving stuff a shot.
OP I'm so sorry about your upbringing restricting you from what you love so much, and I really hope you can find something that you will love doing, it sounds like your DH would be supportive at least. Don't ever be scared of being a beginner at anything either, everyone needs to start somewhere and even if one thing doesn't work out, it doesn't mean the next thing won't.