You don't mention when you're planning the trip, what route your planning or how long you have to make the trip. That info would help us provide more appropriate advice.
If I was "in a hurry" (meaning I had 3 or 4 days), I would head S I-25, E 87, E 287, E 380 (to not go into DFW area), S 69, E I-20, S 49, E I-10/I-12, S I-75, and S 27. If I had a week or more, I'd meander off the interstates.
Weather can be an issue that affects your route. So be flexible. Cross winds can be bad in the TX panhandle. Heat will also be an issue. Watch your hydration.
I generally start early, depending on how many miles I need to do. If I need 700+, I leave at 5am. If I only have 600 or less, I leave at 7am.
I ride for a couple of hours (around 140 miles, may a bit longer) and then stop, always topping off the tank. First stop is breakfast (sit down and relax). Second is water/Power Aid/snack, short rest. Third is lunch (again sit down and relax). Fourth is like the second, or I'm done for the day. If I'm only doing 500-600, I'm basically done - 8ish hours in the saddle, four stops. If I need to go further, I do one more segment. I've done it like this many times with my wife. The first time we did it was her longest day in the saddle. When we finished for the day she thought we had only gone three segments because she was not tired at all. Now I can't go anywhere on the bike without her. Pre-covid we rode from Houston to Niagara Falls, across Canada to Detroit and back south. 10 days, counting 3 full days in NF and 2 in Cincinnati. She loved it. I make her the navigator and meteorologist, which she loves
If I'm in a big hurry I continue with every other stop being a sit down and relax stop. I've easily done 1,000+ in a "day" doing this.
Before you leave, make sure you are as comfortable as possible with all the new buttons and their locations. There's nothing like riding along and accidentally hitting a button that turns off (or on) your tunes and you can't figure out why. If something like this happens, just pull over and "trouble shoot" it while your stopped. Don't try to look at all the buttons to figure out what you did while riding along at 75mph - or even 30mph. It's just not safe.
Take a good rain suit, comfortable clothing, helmet and boots/gloves. Don't try doing this with new boots or helmet unless you have to. The odds are there'll be pressure points on your legs/head that will drive you nuts after your first hour of the day.
Finally, remember the last two segments are the worst. You've just completed 1,800 miles and your in the home stretch. You want to finish. No lose your focus. Stay comfortable and focused on being safe.
Have a great trip and let us know how it goes.