If the two flights are booked together, your baggage will almost certainly be checked through to Bergen, and you will not see it in Amsterdam.
When you arrive at Amsterdam, follow the signs for Connecting Flights. You will pass through transfer security and end up in the non-Schengen transit area. At this point, look up your connecting flight on the departure monitors and follow the signs towards the appropriate gate/pier. Along the way, this will lead you through passport controls for Schengen immigration.
All the concourses in Amsterdam are in a single terminal complex with walkable connections between them. No busing will be involved -- except possibly an apron bus from your departure gate to a remote aircraft stand, as part of the boarding process.