interesting facts about LVM:
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You can make a volume snapshot of the system before a major change (for example, an update).
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You can enable caching and use HDD together with SSD cache
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You can build raid 0,1,5 directly on LVM (you still need modules from mdraid)
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Even without a raid, you can expand the partition beyond one disk to another or migrate the partition from disk to disk (without even disabling it)
However, all this is done from the console and I do not know if there is a GUI.
Raid: https://wiki.archlinux.org/title/RAID
Don’t forget part “email notifications”. In addition to configuring the raid, you need to understand when the disk crashed, otherwise the raid will not help.
If you share files with windows. Basic way SMB share: https://wiki.archlinux.org/title/Samba
if you want share files with linux or windows with not basic ways you have many choises. NFS for example, or sshfs if you need folder time to time, or share directory with nginx ( https://stackoverflow.com/questions/10663248/how-to-configure-nginx-to-enable-kinda-file-browser-mode ), or overkill: nextcloud server.
UPD: In general, you just need to find a linux distributive with good documentation and use this documentation for the first time. Some things are solved differently in Linux than in Windows and you just won’t know about it without reading the wiki.