my school bought adobe cc and i want ant to acces it from home

Did your school's IT dept set this up for you?  They will need to do that first. 

1. Open CC Desktop App.
2. Click your Avatar (top right image) > Preferences > General tab > Settings. Select "Always keep Creative Cloud up to date."
3. Click on your Avatar again.
4. Sign-out of Creative Cloud.
5. Close all apps.
6. Restart your computer.
7. Open CC Desktop app.
8. Click your Avatar.
9. Sign-in with the ID and password that your school told you to use.

You need to contact the person-or-office at your school who controls the subscription