Welcome and congrats!
I think many beginning RVers don't realize that you probably won't cover as many miles in a day with an RV, compared to a car trip. We average about 50 miles per hour on interstates, driving 65. Six to seven hours fits my copilot about right, although I am good for much, much longer.
We enjoy relaxed evenings and unrushed mornings, with brief stops for fuel, to stretch and for lunch. When we are on a time crunch, we'll do up to 400 miles. We'll stay at WMrt or Cracker Barrel if it isn't too hot and it doesn't make sense for us to use a campground. Check out the OvernightRVParking ap or website.
We plan to stop on the far side of bigger cities, so we aren't fighting the traffic in the morning. We do the same for car trips. Some folks are wanderers. We are planners, with a flexible planned route and stops.
If you have been reading the forum awhile, you've probably seen the good advice to get an alignment from a capable truck service. Some coaches don't need it, some need it badly.
Been to Colorado many times, and one trip will leave you wishing for more! Enjoy the journey!
May the trails always twist in your favor
May the tales always end in good light
May you have more friends than one campfire can hold