Firstly, do not call your own art crappy, and do not hate it either, it is too negative. We're in a world where everyone is better. So we should at least enjoy what we draw, yes?
You do not "suck" at drawing hands. You are just not comfortable with how you draw them because you do not draw them enough. Now, you have a hand at present that you can use as a reference (the one you're not drawing with). Draw this hand 20 times in different positions. Than 20 more times. In fact, just keep drawing that hand until either the drawing hand falls off or you feel comfortable drawing hands.
Also, I like your cute little critters. And you have a good handle on shading. You just need to be confident enough to draw hands and draw people in different poses. For this I would say to go out and gesture draw people. Gesture drawing is getting the movement of the form and not worrying about details, and if you think about it, movement is more important than details in the long run anyway.