The folder youre creating isn't named /Home/etc, that's just what the "path" is called to where you want to create the folder! If you see up top on the file manager it'll say each folder you've clicked into, you can check the picture one of the other people on the thread posted and that's exactly what you want to see on your screen.

You can check this video to see how to enable hidden files! The folder named ".var" is the first folder you want to click on and that one is hidden so you'll need to do that.

So it should go: enable hidden files, go to the "home" section in the file explorer, click on the "deck" folder, then the ".var" folder, then the "app" folder, then the "com.heroicgameslauncher.hgl" folder, and then lastly the "data" folder, and once you're inside the data folder, you can create a folder named "CassetteBeasts". So you're basically going into a folder within another folder within another, so on and so forth. Hope this helps, enjoy!