How to add email address that uses Gmail interface with different domain?

I have a free license and a personal email but want to also add my school email which is through the Gmail interface but instead. Is there a way to do this?

Go to Menu > Tools > Accounts, and click on the + icon.

Enter your other email address in the Automatic Setup, and follow the instructions.

The automatic setup never works, and it sends me to do it manually. What should I do?

I am not familiar with the provider, but you can do it manually.

Instead of Automatic Setup, choose Mail > Other.

You will need some information from your provider, like the IMAP and SMTP server names.