You mean Git SCM/VCS? GitHub is a Microsoft-owned software forge. True that it has a lot of software hosted, but personally, I think they’re scummy. There’s are other alternatives, like Codeberg and GitLab. It shouldn’t matter what forge you’re using realistically, but ideologically, if you’re a copy-left hardliner, you might want to avoid them.
You don’t really need to use a tiling window. You can still use a floating window manager and learn Linux stuff.On my Guix system, I had River setup with Waybar, Rofi and Rivertile, with other utilities like WirePlumber, brightnessctl, etc and I didnt really enjoy the experience. Sure, I could have spent some more time on improving that, but I thought that it was pointless having dotfiles next to my scheme config, so I went back to GNOME Shell.