Aracely, your pictures of you hand are quite nice! You have nice hands - mine are all rough from working on bicycles, so I'd never photograph my hands. I do use my wrists tho, but I keep my fingers out of the shot.
I get my husband to model my men's bracelets. Normally he is very accommodating & happy to help, but once he was watching a football game and he didn't want to leave the den, so I took the bracelet, the camera and the white cloth into the den, opened all the blinds for light, put the white cloth on the arm of the couch, put the bracelet on his wrist, took a few shots, re-positioned his hand, took a few more shots all while he was watching the game. The shots came out pretty good!