Photographing is like cooking !
When you start you have to follow some receipts in terms to learn. When you get the good taste, you will be able to add your personal touch.
So, if you want to concentrate on one genre, i will suggest:
- find some photographers that you love their style
- try to figure which combo film/dev they use
- go straight in that genre of photography
- make your art and at least, when you will have feel that you mastered it or if you want to promote, call it "fine art"