hehe, I also do have sometimes trouble finding functions on students
no worry, it's not that difficult:
1. Go to your taskbar (on the very top) 2. Click on the third button from the left side (in german it's called 'Verwaltung') 3. Click on the button on the top left of this menu (in german it's called 'Profil') 4. Scroll down to the middle of the page and click on the upper gray layered button (in german it's called 'Auswählen" and it's below the title 'Portraitbild') 5. Select a picture and upload it