Use the Gmail app. And Google calendar app for calendar. Not the built in Apple email or calendar apps, as they are much less effective for Google products.
Follow the instructions in this video!
Take a look at this calendar key/cheat sheet and attend the meetings that apply to your situation!
For example, if you are on the Rocket Homes team you should plan on attending all meetings with a gold star symbol, Rocket ship symbol, and gray star symbol (when you can).