I compiled a list of links that might be helpful if you don’t find your way around. Most of them I actually found on the Office Support Website, which you should check out as well.

Go to Microsoft 365 Login and Check these important links about Office 365.

Office 365 sign in sign in
SharePoint team siteshttps://{domain}
OneDrive for Businesshttps://{domain}{UserAlias}_{domain}/
Public websitehttps://{domain}

Also, you should visit the Microsoft Office Community, which has lots of helpful topics about troubleshooting.

List of Top Universities using Office 365: