You can access the installer for Microsoft Teams by opening the following link:
https://www.microsoft.com/en-us/microsoft-365/microsoft-teams/download-app
After clicking the button to download, you may be prompted to save or run, or it may download automatically without a prompt. This depends on your browser settings. In Chrome, you can see it auto-downloaded to the bottom left of the screen, like the example below:
After the installation is complete and you open Teams, you will be prompted to enter your email address and select sign in. You will then see the myDMACC page where you will need to enter your password.
After entering your password, you will see a screen that says Loading Microsoft Teams...
Once finished, the Teams setup will be complete and Teams will open for you.