Make sure it is your Studentnumber@pdsb.net. You should receive an email when you are added.
Go to https://www.adobe.com/ca/ and click sign in. Make sure to sign in with your 00000@pdsb.net account where it says "email login". Do not default to "sign-in with Google" or your account will not work.
Download any apps you think you need for the course. You are also welcome to explore new apps on your computer and mobile devices.