This is a very important stage of learning a foreign language. You don’t need to know all the grammar in order to be able to speak. As soon as you have a basic grammar structure and a little vocabulary you have to try to speak. You will learn the rest of the grammar with the conversations more than in the book.
Based on your level, I will talk you through the rule in a fun and entraining way. You will be surprised about how easy is to learn without much studying but with a lot of practice 😉