We travelled from Jakarta to Bandung by train which is very easy to do. Make sure you buy the tickets a few days before because the trains from Jakarta can get really busy. The machine were we bought our tickets from was also in English 😁😥.
We had a really great stay in Bandung. We hired a car with a driver for 12 hours to scout the south of Bandung. We visited some nice villages and some hot water/volcanic areas.