Definitely rock rails if you go off road, mine have saved my rocker panels a lot of times.
The new Cherokees have a lot better lighting but you may want better driving lights or fog lights depending on where you drive.
Hopefully you have factory tow. It is a good receptacle for a bamboo bumper, reversing light and/or backup alarm.
A Hayne's repair manual is handy so you don't oops.
Almost everything you need to know about your Jeep is on this Forum.
The rest is in the Owner's Manual, good reading if you have insomnia.
Create a Jeep Owner's connect account for Recall and other information.
Check DriveUconnect so you can stay up to date on Uconnect updates.
Check this Post, especially leaking welded seams: Owner post delivery checklist
It is easier to get things fixed while still under Warranty.