The Original meaning of Kung Fu doesn't just apply to martial arts. It is the Practice of any discipline or art that takes time and effort to attain. You could say that anyone who has achieved a level of mastery over a particular skill is a person with good Kung Fu. Anyone can have it if you know a really good plumber they could be said to have good Kung Fu.If you know a good tea maker you can say they have good kung fu.
Traditionally, it was also quite common for a person pursuing a life of Kung Fu to have a mastery, or at least an in-depth understanding, of many other different arts and skills. You could be a skilled martial artist but also a skilled Painter or writer. There wasn't a pigeonhole to say I am only this, you could be many things.
I always felt that being a musician defined me as such. As a musician, I allowed myself to be good at music but not other "things". Promotion? nope, I can't do that, Marketing? nope, I can't do that. Running a business? the list goes on.
Starting a business online by yourself means having to figure out a lot of different skills, and If you close your mind to only believing you are one thing means other areas will fail, or at least not be approached with confidence. It would be like putting a Ferrari engine in a Volvo, unbalanced.
So what to do?
Firstly, abandon the titles, Musician, Artist, Promoter, whatever you choose to call yourself does not define you. As a person of Kung Fu, you are all these things and none of them at the same time.
Secondly, Embrace the idea of applying your skill level in your specific area to all the other areas. If you're already a person who knows how to achieve in one place, you can achieve in another.
It's the digital renaissance, master one thing and master many, Be a person of Kung FU.