Welcome John! Congratulations on your new trailer.
Aquaman's advice is excellent! Lots to learn here, in both the forum and in the FRF
Library.
Your first few trips will tell you a lot about what you need to know for your particular camper. I'd advise some camping in your driveway, with a pad of paper and pencil to write down items that you will need to buy or have questions on.
Also, I suggest that you create departure and arrival checklists.