Which spells work is up to you, and your beliefs. Generally we like to tell people that they cannot change who or what they are, or physical appearance (physically, that is). I encourage that you use common sense when looking for a spell form the site. Spells that allow you to throw fire balls at somebody, "bend" elements, or make claim to turn you into a vampire/fairy/mermaid/etc, are considered to be fake spells.
Instead, for physical appearance, there are illusion spells called "Glamours". If you want others to see you differently, then I suggest you look into those kind of spells.