With the grinder I think you need to decide if you're going to use different coffees. I like having 2-3 choices available so a grinder with a hopper doesn't work for me. The other alternative is grinders intended for single dosing like the Kafetek Monolith among others. I have a Compak flat-burr grinder I modified for single dosing simply by removing the hopper and using an cheap aluminum tamper with a ball-end handle as a bean weight. I weigh the beans then put them in the grinder with the tamper on top to keep the beans from "popcorning" out. This allows me to switch beans easily but takes a few more seconds then simply pushing a button on a grinder with a hopper. For a single doser you want to make sure you have a grinder with little grounds retention. My Compak can be almost completely emptied of grounds using a simple bamboo skewer to clear the chute.
On the subject of beans this has been a favorite, and they are local...
https://dragonflycoffeeroasters.com/products/emmas-jo-the-leam-hammer-blend-12-oz-whole-bean
I've used your technique with the Quamar M80, but there is always some bean fragments left. For this reason, I use a separate grinder for decaf and regular.