CCU is way up on a mountain, far from the main parts of the city of Taipei. Unless you live in the area around the university, you will be faced with long commutes. If you walk or bike up (doable if you’re fit and into fitness), you’ll likely be drenched with sweat when you arrive at class.
Great views up there, interesting neighborhoods, and close to Yangmingshan park.
The bus up there is really cheap… only one ticket from most nearby MRT stations (260/260 local from Jiantan MRT, Small 15 from Jiantan. Red 13, etc.) and the distance especially uphill is long. It will be easier going down than up. Be aware that roads on Yangming shan is very crowded and people do not exercise proper cautions when driving around mountains, so you will do well to take the bus.
260 local and Red 5 runs more or less every 5 minutes from Jiantan MRT station.