One way is to install a linux in either real hardware or a virtual machine.
As for distribution: mint, ubuntu or fedora are popular choices for desktop installations.
First thing, please tone down the shouting. There is no need to abuse the volunteers here who have given their own time to help you.
If you had genuinely learned C programming, then you'd already be able to use it from Linux. Indeed, you would almost certainly know the difference between Linux and a programming language. If you install an IDE using your package manager, you will find that it pulls in the build tools you require to build C programs from Linux.
The language that you're hinting at, as has already been said, appears to be bash scripting. Provided you have the bash shell installed (and pretty much every Linux distribution does) then you've already got the tools you need to write scripts. You may need a text editor (something like gedit or, even, vi) or you could edit the scripts in any IDE you're trying out - they're just text files just like the source files of other languages.