How to be great

Is it just me or do we all have a new hobby every few weeks? I'm 44 years old and I have done so many things until I've gotten ok at them, but so few until I've gotten really great at them.

How do you guys get great? How do you find a groove that lasts more than a year or even 3?

Is it building habits or is there some deeper hack for people like us?

Thanks!