Okay, I have had a tablet of some sort for years now, and I'm still not 100% with it... I draw and ink way better on paper. HOWEVER, I have been getting much, much better, especially since I decided to do Lawn Darts totally on the computer. I think you just have to do that - do a side comic or a series of illustrations and force yourself to do all of it on the computer. Otherwise you just never learn, because you don't have to.