Newbie disk partition LVM Gparted. Advice needed

Wish to set up partitions to seperate user activity. Got Peppermint-os distro with pre-installed LVM partition tool. Partitions & LVM is new to me. Noticed many people talking about Gparted. My goal is that every user of the home computer get his own operating system separate from others so that any mods/viruses stay isolated from other users & wipe-able. The computer is too weak for Qubes-os(which i hear people say is the boss). How would you suggest i set this up ?
I was thinking using a super light distro for the partition tool install & then into partitions bigger distros. Example: Peppermint-os(or lighter)=partition tool install & then bigger distros like mint/manjaro in user partitions. Not sure how it goes, thinking hard.
What you think,what do you do ?

Thanks for reading, your knowledge & advice would be greatly appreciated!