Well, Lunar, do you draw with the paper turned to one side? (I used to draw on an angle, and that would make my people lean slightly. This is even harder to negate when you're working on blank paper instead of lined stuff.) If that's what you're doing, then turn the paper so it's straight and draw that way. Otherwise, sketch out the entire figure first, or if you're willing, draw it on lined paper and use the lines to keep your figure straight, since you're inking (and can therefore get rid of the lines later.)
Otherwise, good job! Hands aren't that great, I know, but they're the hardest part of the whole thing.