I'm the exact opposite! I my pen-and-paper drawings look like utter crap, but in a digital medium, I'm halfway decent. My advice: Have lots of patience, and watch other peoples' playbacks to pick up techniques! I like to draw my guideline sketch on one layer, then use the next layer to fill it out. It tends to work out better that way.
"I have nightmares about Hell, where all I do is add up numbers and try to have conversations with people like you." - Bob the Skull