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 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 ( stackoverflow.com/…/how-to-configure-nginx-to-ena… ), 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.