The most common problem I see with new cars (especially the RedCat/Exceed brands) is flooding the engine. Sometimes a quick, small prime is all that is neededand anything else will prevent the engine from starting.
There are a slew of variables involved, but I always recommend to "de-flood" your engine when all else fails (whether you think it is flooded or not). Even a drop of nitro into your carb will easily flood it. I recommend de-flooding it like no tomorrow, and then trying to start without priming it. If that does not work, give a quick prime (one pull) and try. Also try a blow dryer on the engine (you'd be shocked at how much heat helps).
Below is a video I did on starting nitro engines. Go to 5:30 in Part 2 to see an engine similar to yours. However, the concept is the same for ALL nitro vehicles, and recommend you get some popcorn and watch all three parts in full ;-) Really not trying to tout my YouTube channel here, but there are so many variables, it's much easier to provide a link rather than type it all out
Please do us a favor and let us know how you do. Thanks!