Inject animal blood (DNA) in my own body

Hi in the last thread I posted that I want a girlfriend and I want to impress her.Another problem occured my own body îs like a rabbit and my hands look like rabbit paws.I'll do anything to Have a body that can carry a girl.
I know this sound stupid but my body îs very weak.I know nothing about biology.
Isn't that how biology works?You inject the chemical boost and You become a mutant and Have different skills?