Welcome to this forum and congratulation on your new trailer.
There is a lot of information that will be covered during your walk through. Suggest you have another person video tape it. My wife used her iPhone video feature and I took notes. This worked out great for us to refer back to the video. Take your time and ask lots of questions when unsure about anything.
Be sure you are connected to shore power and turn on all appliances. Have them fill your fresh and water heater tanks the day before your inspection. Also the city water inlet is connected by their hose the day of your inspection. Check plumbing under sink for water leaks and under trailer for leaks. Check there is hot water delivery to your sink and shower. If you have a spare tire, check to be sure it is the same tire and wheel size as your trailer tires/wheels (our spare was not the same).
with your new trailer.