How I study English1-7

I watch movies often, so I training listening skill usually. When I watching a movie, I listen to English and to watch caption in Japanese. And, I listening music in U.S or Canada. These songs are in English of course, so I think my English skill is improve a little naturally. I need not only listening study, but also grammar study. I’m not good at grammar. I want to study it steadily. I rent a book from my university’s library recently. This book is grammar book. It is very useful for me, so I read it. I want to rent grammar book again!