Business Studies is very content based. But I think it's mainly the words you need to understand, then the rest will make sense. Maybe you could borrow a textbook from school? They should have a glossary of terms in the back, all of ours do. And you could write notes on the meanings in the back of your book.
The subject isn't that difficult once you understand the words. I think it's kind of like learning a new language.
Or, you could ask your teacher. Tell them you don't understand. It is their job to make you understand