thanks^^ I can't say i'm living easily from it, but it's how i earn my living. But it's more of a networking problem than a skill problem right now. It is bound to get more easy as i go.
The fundamentals are very important and it's the best way to get better fast.
I can say that your work reminds me of my own paintings in the beginning. Especially after i heard about feng zhu haha. So there is every hope that you are on the right path. If you want some advice, it would be to not go full black and white like you do. Start with middle values and keep there for as long as possible. Not full white or black but 75 black 50 grey and 25 white...if you know what i mean. If you need contrast you can easaly contrast with photoshop. But the reverse is not true. So keep your values thight in the beginning and contrast later.