main VS website

Best place to start is to get rid of all the layered packages (RPMFusion) on top of the immutable image then swap to the ublue-Nvidia images that have all the codecs and Nvidia drivers built into the image itself.

If you're using Nvidia I'd recommend using Fedora Kinoite with the ublue-Nvidia image that comes with the Nvidia drivers pre-built in. That eliminates a big chunk of issues with their drivers which is just building the damn things. AMD and Intel drivers are built into the kernel and require zero effort.

What you are looking for is UBlue, https://github.com/ublue-os/main.

It's a variant of Silverblue with Nvidia drivers built in.

If you're using Nvidia, then install using the ublue Nvidia image which has the drivers built in, cause they can be a prick to manage otherwise.

What these sort of introductions to immutable always fail to consider is the other side of the coin, image-based. I'm working on https://universal-blue.org/ along with many people much more skilled than me. We build OCI container images on top of vanilla Fedora Silverblue & many other editions with different desktops. Those images can then be booted to (or rather rebased to) using rpm-ostree. This is a more robust way of extending the system than layering, and the same changes can be easily benefited or inherited from by anyone. You can even make your own image really easily!

I think that VanillaOS and SUSE are working on similar things, but we're not an OS project, just a downstream from Fedora. Fedora's full support is underway but with what's already working perfectly our methods are already IME some of the most robust and easy ways of delivering Nvidia drivers for example.

Download: https://github.com/ublue-os/main/releases/tag/v1.1.8

There are a lot of third-party Linux apps built with GTK4/Libadwaita. If you just to to https://flathub.org and click on random apps a lot of them will use GTK.

I would recommend taking a look at Flatpak

flathub flatpak format apps/games for linux desktop, does not require any specific linux distribution just that flatpak is present on the system.

Which X clients are these? You didn't name any so let's just look at some of the popular and recent flathub apps: https://flathub.org/

I see a lot of games, chat apps, text editors, photo apps, office apps. These all will work fine in XWayland and XQuartz. But also, it's relatively easy to get them running on Wayland natively.

If you're worried about the potential of breaking things, I'd pick the Fedora Kinoite distro. Up to date gaming support, stable and extremely difficult to break. Install apps from Flathub using the built-in Discover software store and go nuts.

You can go on flathub.org to found many other apps you wish to install.

8. Go to https://flathub.org/ and install other useful software.

9. Install an office suite (for example, https://www.freeoffice.com/en/)

For games, Lutris and Steam are your friends.