i think you have another thread with the same question, but 'witch' is just a title. no spell can make you one, if you want to call yourself a witch, then go for it. it doesn't matter if you're a boy or girl.
to cast spells, or for spirituality, study and learn. [meditation is another good idea.] there's many books, sites, and articles to help you.
why do you want to be a witch?