Make sure your computer meets the technical requirements.
The instructors of your courses will let you know what software is needed. Instructions for gaining access to ArcGIS Online and ArcGIS Pro can be found here. If you are using a Mac, please go here for instructions on how to run ArcGIS Pro on a Mac.
Check your Penn State email through Outlook in Office 365. It is important to check regularly, as all essential course communications will be sent through that account. You can also forward your Penn State email to your personal email account.