Google has some amazing resources online that you can use to get up-to-speed with Google Workspace. Check out their Training here: https://workspace.google.com/intl/en_au/training/
Their training includes everything included in Google Workspace, such as business email, online file storage, shared calendars, video meetings as well as individual training for each app (Sheets, Docs etc).
Tips: There's an extensive library of tips on Google Workspace as well, go to the tips library to learn more