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@Nerdzmasterz , if you have an old PC around just install a Linux with a desktop you might like and get going.
Just suggesting wildly, try Debian and XFCE if you like it easy, Ubuntu ("the Windows among the Linuxes", hehehe) if you just want it running with as much hard-/software support as possible, or any of the countless others. Mint with Cinnamon is another light and easy one, KDE desktop for instance if you love as colourful as possible. You can also just run a window manager without a full blown desktop. No distractions pls :-)
If you're unfamiliar with the command line, I'd recommend "The Linux Command Line" lates edition from No Starch press.as bathroom reading.
Edit: QNX, never heard of before, https://en.wikipedia.org/wiki/QNX.
I run Debian Sid (bacause full Vucan support for the RX6700XT without having to install the proprietary driver), various editors for my tinkering with C/C++, from Nano to Eclipse CDT. I don't mean to really recommand or insist, it fits my needs and ... agenda :-)