Using Microsoft Teams is a great way to contain conversations, share files and other resources for a group. Using Notifications from Teams will ensure you know when updates are happening. You can use Teams in the browser, but for the best experience, you may want to install the Teams app on your mobile device (if you want to) and/or desktop.
You can log in here without an app: https://teams.microsoft.com/
Having the application installed makes things a bit easier.
On your mobile device, just visit the appropriate app store and search for Microsoft Teams or use these links
If you are using Teams in a browser, look in the lower left in the sidebar and you will see an icon labeled “Get App”. After you download the installer, follow the installation prompts as needed.