one thing i can say is that you might try looking into other styles. just any other style can help you add more "color" to your playing and help you become more expressive. id also recommend that you learn more about the keys and theory, you can do that here or in books/lessons. when you have a better understanding of the building blocks of music you can become a unique player and devolpe your own style.

dont worry too much about speed, that will come with practice. you can do exercises to incress your speed and accuracy but theory should come first.