Actually, you can make it fly. Sort of. That navigation control which opens with it lets you fly the flight plan, approaches, etc. You can set up common scenarios you have encountered and see how to do them. in the new unit.
Overall, other than the shortcuts provided by the touchscreen - touching a waypoint brings up many choices you would have used knobs and the menu button to get to - you will find much of the logic to be the same or similar to the 430. Garmin is Garmin, after all.
There are, of course some substantive improvements. Personally, I think the two biggest ones are being to load airways directly, not as a bunch of individual waypoints, and the ability to draw an unpublished hold pretty much in the order the clearance gives it to you. If you want to see the hold difference, one of my COVID summer projects was comparing Avidyne and Garmin doing certain tasks. The hold one does runs through it is both the GTN and GNS (and the Avidyne). They are not long. I try to keep al of them under 10 minutes. (Excuse the "typo" of writing or saying GNS when I mean GTN and vice versa - like in that snapshot)