Which MacMini docking station did you get, Ralph? I'd like to hear your thoughts on it after you've had it a while. And even before then if you have any thoughts you'd like to share.Good luck. I’m still fiddling as well. Part of the fun of getting something new. Just hooked up a KMV switch so that I can switch between old and new MacMini. Works pretty well. Also set up a dock underneath the new MacMini. It accepts an NVMe SSD.
I got my MacMini today. After missing the delivery yesterday, and seeing UPS's projection for a delivery window today, I decided to call Apple Customer Support and schedule a drop off at a UPS pickup point.
Bottom line is that Apple did what I needed them to, but UPS delivered it to the wrong location, and I had to go on a "fishing expedition" to find where my Mac was delivered. I got it after I pulled a few of my hairs out of my head in frustration.
Got home and set it up with an old Sony 4K montor and all seems to be as it should. I downloaded drivers for and set up my printers, only to find out that there's no Epson Print Layout software for Sierra 15.x, or so it seems; hopefully soon. Afterwards, I connected to the printers and installed Adobe Creative Cloud and Lightroom Classic and Photoshop.
The next step is to move my hard drives with my photos over, along with the Lightroom catalogs, the the new MacMini. Hopefully, by the weekend, I'll have the new machine running as my primary photography system.