My first recommendation to you is to forget anything that you've seen on television or the cinema about magic, as real magic has nothing to do with what is presented there. As stated above, there are a couple of pinned posts that will help you get started on learning. This is something that takes effort and study, not something you pick up as a hobby or weekend activity; magic is a lifestyle to many. Spells aren't the right place to start off, first you have to understand how magic works as well as "basics" before jumping right into spells.
Voodoo dolls are a hollywood invention, there is no such thing although there are at times dolls used in workings such as to cleanse or protect a person; it is very far from what you see in hollywood. Voodoo is a religion and not a magical practice, although magic is enterwined within it; Voodoo is a belief system and religion.