Maybe you want one of the turnkey solutions. There are several solutions that offer you a NAS box with everything pre-configured and a management web-interface. Assembling a RAID and creating a network share is just a few clicks with those. And they should come with documentation.
I don’t really know which one is best. There is openmediavault, unraid, EasyNAS, TrueNAS, …
I agree. Configuring everything yourself, Learning about RAID, filesystems, networking and file servers on an operating system you’re not familiar with is some work. And although Linux has adapted quite some Windows-workflows, setting up Samba isn’t necessarily the right-click - properties - share you learned from using windows.
For security cameras there are solutions like Frigate which can be installed in a container.