G;day j2TX, Welcome to Linux.org
I'll try to line the ducks up in a row for you....
Will you be trying Linux on a pc that already has windows on it?...or do you have a latop or another desktop etc that you can use?
In a nutshell, you can download linux....which one depends on the capabilities of the pc you use......once it is downloaded you then "burn' that file to a usb stick using balena etcher or rufus....(there are others)
Then you put the usb stick into the pc you are going to use and you Boot the pc to that usb stick.
That will open up a LIVE version of Linux.....which you can experiment with to your hearts content. Do anything with it at all....bend it, twist it, attempt to break it, etc etc etc.
If you do break it.....just pull the usb stick out and boot to it again and away you go once more......no harm done.
If there is already windows on that pc, it will do it no harm either.
It's like having a practise range.
A couple of things.....if you reboot the pc, you will have to boot it to that usb stick again.....and if you set up a browser or change a setting or whatever etc etc etc while you are playing/testing it...when you reboot or shut down all the changes you made will go kapoof....gone! .....It is better that yoiu know that, otherwise you will think you broke something beyond repair
It is a great way to learn. it gets you used to navigating your way around Linux, and you can post questions etc etc etc on here while you are doing it....so that you can put the new knowledge straight into practise as you read the answer that comes back
That should give you something to think about.