The rainbow plus sign allows you to create new folders and new documents, sheets, slides, forms, &c. in your drive or in your Shared drive.
You can find out more about Google Drive here and more about Google Shared drives here.
You can also create new a new Google Doc by going to docs.google.com. Here are some directions for creating a document outside of Drive. This is also true for Sheets (spreadsheet) and Slides (presentations).
The rainbow plus sign allows you to create new folders and new documents, sheets, slides, forms, &c. in your drive or in your Shared drive.
You can find out more about Google Drive here and more about Google Shared drives here.
You can also create new a new Google Doc by going to docs.google.com. Here are some directions for creating a document outside of Drive. This is also true for Sheets (spreadsheet) and Slides (presentations).
Meet. Once you are in Google Meet, you can join a meeting and then invite others. You can also set up a meeting in Calendar and add Meet, and then invite anyone else in HERS.
This video gives an easy-to-follow guide. You might also find this support document from Google useful.
Chat. Once you are in Google Chat, you can send a chat message to a room (June Participants, for example) or send a chat to a particular person. You should be able to send chats to any of the participants by typing their name. This support document from Google provides step-by-step instructions for using Chat.