There are quite some formal matters you need to arrange once you have arrived in the Netherlands. Learn how to do these things in a practical order.
For a mobile phone subscription you'll need a bank account first
Also consult the international office at your host university. They can share their experience or recommend a good insurance provider.
For other matters such as: traveling by public transport, where to buy yourself a bike, campus orientation and other useful local tips, we would like to refer you to the international office of your host university.