In any case please stop the dreaded splitting in multiple parts. If it ends up multiple videos of content it is fine to leave out a video or 2 in the release cycle, but it is really annoying to find a video you like only to find out there is a second part not released yet.
As for the scene iitself, I think CzechVR is a great example the have quite a few great scenes with 5+ girls. What makes them so great is that you have constantly have multiple girls interact with you, they surround you, look into your eyes whisper in your ear or touch and lick your body. And the girls in the background have fun with each other.
An example how to not shoot a multiple girl scene is this: https://www.sexlikereal.com/scenes/the-harlots-house-black-friday-in-europe-part-1-17750
This is basically just a scene where you fuck one girl after each other with most of the background girls just sitting around bored.