Some suggestions, if you can stand some:
First, continue having fun.
Continue being excited.
Do read the manual a couple of times. For some reason, those Digitrax manuals confound about half of the hobby's denizens. I hope you are not going to be one of them.
Take your time getting to first power-up. You won't break anything, but if you do something and nothing happens, it's a little disconcerting. So, be calm, take your time, and keep that manual beside the beer/coffee/tea/almond milk.
Continue being excited, and continue having fun.