A quick update - I visited the person that offered the help. He had an actual studio.
He went through my camera settings to verify some things, and then set up a specific configuration of iso, ss, aperture and focal length. Then did the same on his Z9. We both had our Z 70-200 2.8 lenses mounted. Both set ups with the same firmware versions.
He had a test chart mounted and a strobe. Long story short, my test chart image shot just fine. Sharp, crisp edge to edge, top to bottom. Even zoomed to 150%, sill looks good.
The camera behaved "as it should" when we worked with it going though various settings and configs.
He also spent a lot of time with me just sitting at the bench, going through various menu setup ups and functions, and answered every question I had, and we even tested several 'what if' shooting scenarios with varied settings. I was happy that I am actually starting to feel comfortable and able to follow the work flow in setting up features and combinations and even menu banks. I did reach my saturation point, but I have more than enough confidence and newfound knowledge to start using the camera.
Still amazed at the willingness of others to share and help here on this forum. So different from some of the dog eat dog Facebook photo groups I've read.
Note: Test pattern had to be resized to post, but still looks good
Cheers for now.
Happy Holidays!