To setup gmail multi-factor authentication, please follow the guide below:

  1. Navigate to https://myaccount.google.com/security

  2. Under “Signing in to Google”, Click on 2-Step Verification
  3. Click Get Started and then sign in with your school email credentials

  4. Select "Authenticator" and follow the setup instructions
    More info: Get verification codes with Google Authenticator - Android - Google Account Help 

  5. Alternatively, enter your phone number and continue through the next steps, and pressing “Turn On” when asked.