Hey! ^^

If you have seen my fan art, I have mainly done my art in pencil, line pen and GIMP. But when it comes to colouring, it looks bad. The line becomes all holey, and on the edges it becomes quite pixelated.

I don't want that to appear, but at the same time, it's the only thing I can actually do.

I have a tablet, but the problem is, my hands are really shaky. I mean REALLY SHAKEY. The lines go every where, even in my pencil drawings!

I want to be able to do drawings by tablet and make it look good, but I really can't. Does any one know any ways I can improve on that? How to draw on computer and not have any scruffy lines that go every where?