If you're a shy person who would like to do better in social situations - learn to dance. Becoming a dancer opened up all sorts of doors for me. It made me comfortable in social situations from small-talk in intimate groups to public speaking in front of large ones. I even ended up married and living in a foreign country. Currently I'm learning the language and making some progress. All of which I can trace fairly di…
Which is another skill you could learn in a short amount of time - a basic sense of rhythm. Tapping along with music or a metronome works, doing something more complicated with two hands is also an option. There's both online and offline drum / percussion lessons you could take; doesn't have to be much, you get the basics pretty quickly.
Same can probably be said about basic music theory. I've tried a few times but I still don't really get it though.