Thanks for the input everybody.
Perhaps it seem a bit weird to sail a beach-cat up here where the summer is short and the water is cold all year long.
We do have a beautiful archipelago area to explore, and an active boat culture.

I was thinking to take up windsurfing, but then I thought catamaran sailing would be pretty close + more social and a bit drier = warmer, and with a good dry suit + pfd it'll be no problem.

I'm going to Thailand this wintwer and there I plan to take a catamaran class and then rent catamarans for recreational sailing.
Hopefully they have a few models that I can try out and make my own opinion.

Can anybody tell me the diffrence between all these new plastic cats from Hobie, they all look the same to me:
Twixxy
Wave
Teddy
Dragoon

I still think that one of these, ~€5000-€6000 are within my beginner budget...(or a second hand Hobie 16)