[NL] Where to start

Hey all, as the title says, I want to get into the hobby of collecting cards and the likes.
I'm from the Netherlands, and have no clue where to start regarding which stores sell anything, what to buy and what definitely not to do.

Always have been a huge fan of Pokemon and am currently a collector of LEGO and fine wines, and was a collector of regular playing card decks.

Every reply and all information is much appreciated!
Happy new year and may all luck go your way!