No matter what you draw, one of the ways to get good is to practice drawing hands. Believe it or not, drawing hands can be very tricky.
If you work in comics or illustration, then drawing of hands is a must! Some editors will look to the way people draw hands. If the artist they review can’t draw hands well or avoids drawing them, then it may be an indicator of other problems they’re covering up.
Jack Davis of MAD magazine fame is renowned for his ability to draw hands. If he can do it, you can too.
For a bit more info on drawing hands, check out this neat YouTube video courtesy of Mark Crilley.