Welcome to the Forum from Western New York State! Congratulations on the new Jay Flight!
There's a boat load of great information on the JOF. For a starter, here's a thread with some basics to think about.
https://www.jaycoowners.com/forums/f...ayco-2359.html
Here's a PDI checklist, for when you go to pick it up at the dealer. Very important to do, and a video on your phone as you go along can be referred to later.
https://www.jaycoowners.com/forums/f...ted-36094.html
Look for "stickies" at the beginning of each forum subject. Those are permanent subjects that are helpful, and about frequently asked questions. You'll need some basic important items such as wheel chocks, fresh water hoses, sewer hoses and fittings, etc. There are posts with a more in depth list of what other members deem necessary, and more lists of things "nice to have" to make your trips more manageable and stress free. What we carry in out TT spans 5 legal pad pages, but that's just us.
We're glad you've joined us here on the friendliest Forum on the planet! Happy camping!