> I don't obviously see how to do [install the latest version of Zoom] with nix and I don't really want to spend the time to figure it out
nix-env -iA nixpkgs.zoom-us
or if you prefer,
nix profile install nixpkgs#zoom-us
That said, the Zoom package in Nixpkgs is (IIRC) actually extracted from the upstream Snap distribution of Zoom, and the Flatpak version of Zoom is actually the one I last used on NixOS. :)
(For proprietary software like Zoom, I think Flatpak might be preferable even to many Nix users like me.)