I need some help...

[Supafly345]

Remember that the hand is not flat. Like a spade shovel, the width of the hand curves around. Your best bet is to model your own hand, and to add girth or whatever to it after it was drawn. In fact, using yourself as a referance model for most human bodyparts is commonly practiced as the best way to approach this.

As for the foot, all I can say is to pay special attention to the accented round parts: the ball of the toes, the heel, the arch, ankles, ect.