Don't waste your time on a tourist trip to a ha ha cheese farm. Most Dutch cheese is a factory product.
Amsterdam has its own cheese, Oude Amsterdam, which has a black wax coating and is nice and salty. Most specialist cheese shops will sell it. Ask for a taste before you buy.
Wout Arxhoek on Damstraat 19 is a good Dutch cheese shop - bit touristy in approach but a good choice.
Abraham Kef on Marnixstraat 192 is famous for his French cheese.
And the Saturday organic market on the Noordermarkt is the place to buy organic cheese - especially tiny hand-made goats cheeses.