It can be helpful to check the website of a reputable escort to see if she has a listing of sites on which she advertises. The assumption being that if a site is worthwhile from the provider's perspective it should also be from the client's. One provider who posts occasionally in this forum has a page on her site listing quite a few Europe-centric ad sites. This isn't an endorsement of her personally, as I've never seen her, but rather just a suggestion as to where you might find some answers to your question.

Look here

www.kinky.nl
www.citygirl.nl

There're a lot of ladies who speak english because in Amsterdam there're girls from many different countries.

Tried out DollHouse

used dollhouse and they rock!  

https://www.dollhouse.nl/

....is it doubles as a review site (it's Europe oriented though).
I've been doing a bit of research of my own since i'll be running around Amsterdam in early summer.