Welcome to The Netherlands!
I myself am located in Amsterdam Noord, which is like 20 minutes with the bus or car for you. We often play EDH on Sunday afternoons in Amsterdam center. If you like you could join us some time? I work near Metro stop Henk Sneevlietweg, which is fairly close to station Lelylaan.
I've also heard of an active FNM community in Purmerend, I believe it's organised by Zap! games. Their website can be found
here, their address is at the bottom of the text on the main page. I've been there a few times, but never for the FNM specifically and not more than like once every 2 years or so. They have some tables set up upstairs and it used to be that you could sometimes find people to play with there. If you want to visit the FNM I would check with the shop where they play as I have some doubts they can fit an entire FNM in their room upstairs.
Long ago, between '99 and '03 I used to visit a monthly convention in Purmerend that attracted about 40 players at a time and the Unhinged pre-release in Purmerend had about 50 players in it. I'm afraid I'm not sure how active the Purmerend community is these days, but I do still run into people from back in the day every now and then. As they run FNM's there I would guess the Magic scene in Purmerend is still going strong.
You might also consider playing in Amsterdam as it's fairly close to you. Nedermagic.nl organizes a weekly draft in Amstelveen, which is like +/- 500 meters outside of Amsterdam, they sometimes have other formats too: this Sunday they're doing a Legacy tournament. There is also the weekly draft tournament in the 2 Klaveren, a bar/cafeteria that caters to gamers. This tournament takes place Monday evening. Also pre-releases in Amsterdam are usually held at the 2 Klaveren (though it sometimes varies).
Amsterdam has a brick & mortar store as well, named the Gamekeeper, which is located fairly close to the royal palace at Hartenstraat 14. If you want to travel a little further I would look at Zaandam and Haarlem. I know there are players there, though I'm not as knowledgable on where they play.
If you're also into board-, card- and dicegames I organize a games afternoon in Landsmeer every 2nd and 4th Saturday of the month, that should also be convenient to go to from Purmerend (there is a bus that goes through Landsmeer that rides back and forth between Amsterdam and Purmerend). We will have a summerstop, but the 13th of July we'll do the final one if you'd like to check it out (and it'll include a BBQ to boot, though you will have to sign up for that and pay 10 euros, the games afternoon itself is free).