Puerto Rican American

My parents were born in Puerto Rico. They were divorced when I was a very young child. I was raised by my father and stepmother who was not Puerto Rican and did not speak or understand Spanish. My father did not speak Spanish at home and therefore I lost most of the language. I can read, write, understand and speak proper basic elementary Spanish as I learned in school but that is limiting to me. I should take it upon myself to purchase a home study course and teach myself the language, I think it would be a nice goal to have and achieve. Necesito un poco ayuda para comenzar.