Because the earliest class starts at
8 in the morning, the bus should be available around 7.30. If there are no busses, then you should definitely enjoy the morning and walk to your class instead. Which is definitely enjoyable as u can see the sun rising above the trees and the buildings. I used to walk when I had early morning class as it wasn’t that hot yet. If you would walk at a later point of the day, you are at risk to arrive in you class room soaked in sweat. As for the last bus, it’s around 10 PM, so you should finish your errands before that, or take a student cab which are available on call and are very affordable.
Happy learning at USM!