First, if this is your first nitro rc. Take some time and go over the manual real good to familiarize yourself with the truck and its componets. This being a new rc, the engine is going to have a ton of pinch and will be much easier starting of you pre heat the engine with a hair dryer before trying to start. Heat it up over 100 degrees, then try to start it and see if that helps.
These little engines can be stubborn when they're new......