hello and welcome to the forum!
when you are a beginner as you say you are, the best approach is to use only one distro at the time
the reason is that less distros you have on the laptop, more you can focus on one distro
also you can focus on one desktop environment at the time
most of us, when we want to try a new distro(something really uncommon after using pclinux
) only try a livecd or use virtualbox to try the distro installed on a virtual machine
norton commander is a app sold by norton afik and iirc is a defunct app, completely abandoned, not existent anymore and it is only for windows
there is equivalents on linux but i abandoned along time ago this console tools, all i use is gui tools like pcman file manager or dolphin, handle big amounts of files and folders feels easy for me on a gui than in a cli
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