This seems like a dubious move to me, only because I’ve tried Snaps here or there with other distros and it’s been nothing but grief. Do you have a compelling reason to use a Snap? On an Arch distro it seems so unnecessary, I would probably just steer clear if you can.
I installed a Spotify client on this laptop using the Garuda add/remove software GUI tool and it was easy as pie. Why don’t you try that? The chaotic AUR ones are in there too, adblock and so on.
Printers can be tricky. I’ve had distros that are more plug & play than others for no obvious reason. Wth a little hacking around I’ve always managed to end up getting the printer added but there have been times it has taken me probably almost an hour! Just to add a printer! My wife rolls her eyes so hard I fear they might get stuck up in her head.
What program? What DE is this? Why weren’t you able to post your inxi -Faz?
Edit:
I see what you are talking about now, that CUPS page that loads up when you open “Manage Printing”. Honestly, you might not need that. Have you tried using the HP device manager (since you have an HP printer)?