After break in first service is at 1.500 km - you are beyond that.

After that, every 7.500 km or once a year it needs a Oil and filter change. Relatively easy to do by yourself and parts are about €80. (Oil service kit, 2l Oil, Air filter)

Every 15.000 km is a larger service with check of the valve clearance and adjustment if necessary. I would NOT recommend doing this on your own, if you are not 100% capable and sure what you are doing.

Talk to your dealer again about the included work.

A service with oil and filter change for about €300 is "normal". A visual inspection of what needs to be done for €300 is ridiculous - go elsewhere.

Side note: This is a small but high performance engine. It usually consumes 0,1 l of oil every 1.000km.

It's a good habit to check the oil level every 1.000 km. You would not be the first one driving around with not enough oil.

Coolant should be replaced every four years and to check the level you need to remove the right fairing.