The place is amazing. Walk around and make sure you go to the Rijksmusem, Van Gogh Museum, Heineken Experience, Red Light District, and the Anne Frank House. Cannabis can be found in "Coffee Shops". Some can be found in the outskirts but most are within the Red Light District. Walk. I could not stress that enough.
The cuisine is pretty much mostly influences from other countries. So just try the hotdogs, deli, herring, and doner kebabs.