Hello Scar and a big welcome to all your family!
One thing that will help is to spend a couple of nights "camping" in your driveway. This will give you great opportunity to learn about all the systems in the trailer and identify what needs attention before you head out cross country. From personal experience, it was worth the time and effort.
Enjoy your travels and stay safe!
Gary & Deb (42 years)
RV: Keystone 2013 Alpine 3495FL
TV: 2014 RAM 3500HD Laramie Long Box, 6.4 HEMI, 4x4, 4.10's, with Mopar Puck system, and a B&W Companion hitch.