As you are aware in this online lesson delivery environment, you will have to use Google Classroom to access your classes. There are a couple of guides on this this website to help you get started with using Google Classroom. Firstly, go to this link on the front page https://cmmss.edu.lc/logging-into-your-google-classroom/ to learn how to log in. Afterwards go to https://cmmss.edu.lc/resources/ and click on Click here for a useful instructional Google Classroom guide for Students for Google Classroom usage Guide.
Alternatively you can go to YouTube and have a look at any of the numerous videos on this subject. Here is one to get you started.