How do I make a NAS?

[Mallers]

Hello, possibly wrong question in thread title, but:
I have a 9 yr old sony lcd screen, with hdmi inputs and an onkyo amp with a spare hdmi input (optical input being used for feed from dvd player)
I currently also have too many dvds and blurays and no shelf space! So i'm trying to get them all (at least the dvds anyway) onto some sort of hard drive that i can plug into either the amp or telly and watch off that.
I don't really know about storage or doing this, so my uneducated vision is that I feed a disc into my desktop pc, rip it (any ideas on software - understand this may be legally iffy so feel free to be circumspect!) and save onto a separate NAS or media pc that will be small in physical dimensions but big as possible in storage terms and can sit next to my tv. Current tv doesn't have any wireless capacity so i can't stream direct from my existing desktop, and tbh would rather have films on separate drive anyway as pc a little creaky and dont want to lose the lot! Also, some sort of interface (and remote control?) so i can scroll through film covers and descriptions until i find one i like and watch, and as if that wasn't enough, still have things like all the extras that come on discs, eg documentaries, commentaries etc.
Any ideas, or is this a bit much?

 

[Mallers]

Many thanks all! It looks like there is no single box solution (at least not physically small - eg my desktop pc is huge, i wouldnt want something like that next to the telly!)
I love the look of the mede8er, although it looks a little expensive for me. However christmas coming up, tis the season to be jolly and all that! so a definite possibility to buy myself
Looking at the answers all together, a netgear readynas 104 (has its own OS already without me adding anything) connected to an android tv box (ads i saw for this says it has its own remote plus runs KODI) via cable, in turn connected to my amp via hdmi should work? In case it all goes a bit wrong, the android thingy isnt too expensive, if i get right software should it run off a smaller external hard drive? Eg buy the Android box first, i can borrow a friends external drive and if i get that working right i can then expand and buy the full on readynas 104?