Ditto all above.
It all should be fun and no one is grading you
If you make a reservation ask for assistance then or ask when you arrive. A little customer service on their behalf can make a long term customer.
Often the person at the next campsite, if asked, will be willing to help. Just make sure you offer them a beer or soft drink when done. Could be you just made a new camping buddy.
None of it's "rocket science" and a little common sense goes a long way.
Check site for clearance to the sides and above before backing in. Make sure you have room to open slides (no branches, power posts or water pipes in the way of slide). Just make sure your
wheels are chocked and your hoses will reach
before you unhook. Try to keep cords and hoses tucked back so others won't trip on them. Make sure the breaker on the power post is "off" before you plug or unplug. Drain valves are shut before you remove caps or hoses. Keep the fire a safe distance from the camper and have fun. If you do those couple of safety items, the rest is all fun. There are little things and tricks you learn overtime but these will get you started.
Over the campfire you can talk about surge protectors, water pressure regulators, who makes the best lawn chair, and the other nuances to camping. MOST OF ALL HAVE FUN
Enjoy... look forward to hearing about your first adventure. We all have stories to tell of lessons learned.