Avoid taxis! Especially those at the train station will rip you off. Taxi ride from Airport to the venue can easily cost you €45+. If you really need a taxi in Amsterdam, ask the hotel to phone you one or phone the Taxi Centrale Amsterdam: 020 7777777, they are reliable. There are plenty of Uber available pretty much everywhere in Amsterdam.

Hostels / Hotels: Stayokay Amsterdam Stadsdoelen is one of the most popular options since it's walking distance from the venue. A more affordable option is Camping Zeeburg Amsterdam, not very close but has a tram connection.
You can find hotels via common sites such as booking.com easily. Unless you have a good budget (100 euro per night or more), it's advised to not choose a hotel within the canal area - and certainly not in the old city heart or close to the train station. Find a hotel outside the canal area, on cycling distance or one that has a good tram/metro connection to Rokin, the closest station to the venue. Bicycle rentals are everywhere.