I know everyone says this but learn your basics first! To do any type of spell you need to know the bare minimal of magic such as visualization, energy working, shielding, chakras, meditation, circle casting and the basic correspondences.
Here is a very informative link, please remove any spaces that may or may not appear:http://www.spellsofmagic.com/read_post.html?post=280420
Along with that, you may think to look at joining a coven. Though it is not the best for everyone, it could help you learn more from not just online websites that may be wrong, or just one person, but a whole group of people. Although joining a coven should be something you take seriously, don't just join because someone tells you to. Look through all the covens and decide carefully.
Best of wishes,