You can be interested in many things. You can only become native to a few.
A world becomes native when its language stops feeling foreign, when you recognise what's changing before it's announced, when you have a view worth listening to. That takes repeated contact over years — not intensity over weeks.
So the first question isn't what do I want to learn? It's what am I willing to stay close to?
MY DEPTH COMMITMENT
One thing, not a list. It could be a professional craft, an area of expertise, a business, a creative practice, a meaningful body of work, or another long-term pursuit.
A USEFUL DISTINCTION
A utility belt is a collection of things you can use. Nativeness is a world you live inside.
Both are worth having. Only one of them compounds.