The pinned threads in the General Info section are a great place to start.
For beginning a practice, I would suggest meditation and study.
Looking at your profile, I can offer this advice: A lot of spells posted under the spells tab are false. It is why many are under the 'Trick' and 'Fantasy' sections. Magic cannot change your DNA, species, or your physical form. It can, however, help you develop inwardly, and affect probability externally.