Like I said, the drawing looks good, then I scan it and trace it with GTS, and suddenly, if I don't turn up the thickness, the lines have huge gaps, but when I turn the thickness up, I end up with holes/blank pixels inside the lines. It seems like I have trouble making smooth pencil lines, what do I have to do to make it better? I use regular printer paper and not paper specially made for animation. Is that the problem?

Trying to ease in/out an animations keyframes and the arrows i love using to edit arent appearing. Tried to use the function editor but its just really confusing for me which is why i like using the arrows more. Anyone know how to bring em back or why they arent showing anymore?