Yes - putting together a Raspberry PI based music streamer/player is technical but fairly simple if the many millions of on-line tutorials are followed
Regarding NAS drives and using different raids to protect yourself against drive failure - good idea but do not forget to also have a backup!!
Been in IT for many years (coming up to 40 years next year!!) and relying on just the raid is foolhardy - NAS drives fail as a total entity so all data is lost.
I use 2 PI's running as NAS drives and use one as the media source and the other as a backup to the first.
With the size of storage available in the cloud, this is also a good idea to use as a backup location if you don't want multiple machines and storage dotted around your house.
Please do not just rely on the raid in your NAS drive - can end in tears!
Main system:
Analogue.
Michell Orbe with arm decoupling kit & Pete's Pylons. SME V arm, Denon DL103M (FGS), Firebottle OPT MKII phono amp
Technic SP-10 in Obsidian plinth, AT1010 PMAC v8b arm, Goldring Elite MC Cart and BB3 Phono Amp
Leak Lenco GL75 with Ortofon OM10 cartridge
Technics RS-BX404 Cassette Deck
Network Player.
Raspberry PI plus R2-R DAC (also used as a CD player) plus Pi NAS Server
Digital.
Philips DCC 730 player
Marantz CD50SE
Amp.
Audiolab 8000A
Speakers.
Reiver Jenna floor standers
HeadPhones.
Sennheiser HD545 Ref, HD600, HD477