We went to shows for about 5 years before we figured out what we wanted. So you're just getting started.
Use your first show to formulate initial opinions about what you like, what you can afford, must-have features. Also, pay attention to the dealers represented. Most manufacturers have multiple brands that are essentially the same thing, but have different dealer representation. Knowing which dealer you would prefer to work with can save running around later. You can even meet some sales persons and start forming opinions, or at least weeding out the Bozos.