OK, those are the expectations for range safety--
good ones. If you see the basic safety rules are being ignored, leave. Now, here's some more pragmatic comments--not better at all, just other things to consider.
Before going to the range, get familiar with your firearm. Know how to unload it and how to clear the chamber. Know how to set the safety. If you need to break the habit of putting your finger on the trigger 'automatically' from your childhood cowboys-and-indian play days, practice handling at home repeatedly.
Assemble the gear you want in your 'range bag.' You don't need to have a $100.00 range bag--with handguns, that kit of gear could even be a small cheap backpack, or whatever. Do keep in mind that brown paper bags absorb oils and rip, or rip because the gear is heavy.
For a beginner, you should have your ears, some gun oil, and some rags in that kit--along with a small band-aid box for nicks, etc. Ideally, it will be big enough to also hold your ammo and the targets. At an outdoor range, you may need to have a stapler for target attachment to a board.
Read those range rules. Be prepared for the way this range operates: For the 'loaded firearms' issues--
Never enter the range with your firearms loaded.
Load all magazines before you go to the line, as allowed.
Be as prepared as possible before you get there--
Don't forget your ears. (That's gunny jargon for hearing protection.)
Don't forget a second set of ears for your friend.
1. There's no harm in 'watching' for awhile, to see how this place 'works.'
2. Drop the attitude and style stuff: It may be quite common in your circle of friends to dance around, moon each other, or give high fives after an accomplishment, but it's horseplay at a range. If you see it at this range, consider leaving.
3. Have sufficient targets ready to go. Don't make others wait while you are drawing another ball-point-pen-ink-on-ripped-out-notebook-paper. Better yet, think about what you want to shoot (for targets) and bring a lot of them.
Since you guys are (probably) going to a commercial range, you probably will not need to deal with command-driven 'line' shooting--you'll be shooting at an individual station with your own target-retrieval system. That makes it easier for you to simply do your shooting.
But I've also experienced being at such a range when part of a local-gang / brother contingency came in "w' dere' hos" to show off their latest gangsta-shooting styles. For me it was not a comfortable experience, so I left. I also made sure no one noted my departure and license.
For you two who are going to the range for a first time, I'd definitely recommend bringing a friend. A friend good enough to not laugh, and whose will help you feel more relaxed.
Jim H.