You'll never do anything with that mindset. People learn new shit all the time, can't do it all while you're young.
> Greentext
Just in case anyone needs to hear it: You can absolutely start things in your 30's and still feel fulfilled by them, even if there's some 16 year old who is better at them. Do them for you, and don't compare yourself to others.
(Also maybe don't make combat sports your thing if you're prone to that)
Countless amounts of people only pick up new skills before they're adults because, once they're adults, they feel humiliated for, gasps, not being immediately good at something they've just started practicing for the first time.
This is a brainrot that will make you grow hollow and valueless, a shell of a human being who cannot stand the minimum amount of struggle to improve themself, ultimately amounting to an empty shade that might as well be a hum in the background, unable to grow, unable to improve, unable to leave any further mark on the world. Embrace the humility inherent to climbing a new ladder, or else you will never feel proud for anything new you ever do.