Replying to Sping break in Europe as a minor

Anyone have expierence traveling in Europe during march. I'm passing though Brussells on my way somewhere else and want to take a stopover there and spend around two weeks. I'm not sure where I want to go but I was thinking brussels amsterdamn ad copenhagen maybe or just taking the train to paris and spending the whole time in France. I want to get a day or two of skiing in but that is not critical. Any thoughts on where I should go?
I was thinking of staying in hostels but anyother thoughts?

That brings me to another issue I'm still only 17 will that be an issue as far as finding places to stay like it is in the U.S.

The other issue is cost, I have about 2-3k to spend which I think is doable.

Thoghts?