I have played on the same stage as some big punk and metal bands, but my first metal logos were rejected… But hey, I listened to them with fresh ears recently: they sound like unimaginable crap! Having a humble attitude about our works is probably one of the best reflex to acquire to make some cash here.
Or, in other words: I don’t play cute ukulele stuff at punk shows just like I don’t submit drunk punk extravaganzas here anymore. Stage experience is one thing, but working for royalty free markets, another. I would advise to stay around a bit longer and simply learn the ins and outs of this place.
Edit: I see that you edited your original post by removing the self-congratulatory bits. Nice move!
If you choose to stay around, just remember that most of the music sold here ends up as background to videos. The trick is to compose stuff that is simple enough to be used in a wide range of projects, without getting too boring. I think it’s an art (a minor one, of course!) in itself. Most of the big sellers here have tracks with this kind of balance. Good luck!