Homeschooled teens? or parents who homeschool their children? i want to learn a 2nd language?

I'm homeschooled. My school orders my workbooks for me and I do lessons like regular school. I've gotten books from Abeka Books and MathUSee if anyone knows what I'm talking about. I would really really like to learn a second language, japanese, and I was wondering if anyone out there has done that through a homeschool before? Did you order a book from a company like i mentioned? Do you know of any I can get the books through? Also, were you succesful in leaning the language?