Comment by nicbou
I have the same setup and I like it, but traditional media is just much more pleasant.
In any case, practice. Keep drawing, and try drawing the same thing multiple times. Don't just start over, fix your mistakes. Step back and take time off to let the mistakes come out.
Above all, remember to have fun. Mistakes are an integral part of learning, and if you take yourself too seriously, you will never make any. Waste as much paper as you need, if it means that you will keep practicing.