If your profile page is public, you can share the link to your profile.

Click the blue Share button at the top right of your profile page. A dialog with the link and a QR code will appear.

Copy the link to your profile page and share it with your teachers/students/friends. They can now follow your profile.

The link to the profile page is www.edumaps.de/p/username (where "username" is your Edumaps username).