I would say for Linux Mint Cinnamon you really only need to be able to follow directions. Just make sure you have an external backup of all your files in case it turns out you can’t. You’ll have to type some stuff into a command-line interface (I think) but the Mint Cinnamon website has links to step by step guides. Also, you know, make sure you’re either committed to getting rid of Windows, or have the ability to re-install, in case you mess up.

But really, at this point, it’s pretty dang easy.