Hi! Hehe hey, usually the "right" way is like you said ... Background colors first and then black silhouettes. But I have always drawn and created art to my liking and way ... how I feel best doing it. And I think there is no "right" way to do things. Rather, we do things as best we can, in the way that our ability and style is.
Good vibes and I hope you can continue to see a bit of my art.