Hands can be quite challenging, but they're very fun once you get the hang of it... I used to hate them with a passion when I was younger, but now they're probably one of my favorite things to draw. ;D
Yeah, they're definitely tricky. Most of the difficulty comes from how complex hands are, compared to the rest of the body they have an enormous amount of bones and tendons and joints and other good stuff. Plus, hands have tons of character - almost like a face, each person's hands usually look completely different from each other.
I know when I was your age, I never thought I'd be able to draw hands. Just keep practicing and they'll come in time.