Setup Advice Request

[DracarisFire]

My fine senior Jellyfish, I am seeking some advice/thoughts on a potential setup I am planning. Pitfalls, issues, advice, etc. 

The plan is: 

Jellyfin server host running on an Asus/Intel i5-1240P NUC, 500GB M.2 Crucial P3 Plus HD, 16x2 Sticks of Crucial 3200MHz RAM. 
Connected to an Asustor Lockerstor NAS set up with TrueNAS. 
My Internet plan is 50/20 but would like to upgrade that. 
Looking to play 4K HDR 10-bit H.265 MKV files to an LG G3 upstairs but would like to have the capacity to handle multiple streams.
Sonarr, Radarr, Jackett, Overseerr

Questions: 

#1 - Does this sound like a functional setup? Is it the way?

#2 - What OS should I use? Leaning towards Linux/Ubuntu (In IT but little experience with those OS)

#3 - Any tricks to get Intel Quick Sync to lend a hand with transcodes?

#4 - Asustor Lockerstor Gen 2 or 3? 

#5 - Is it worth installing Docker containers on the NAS itself or should I leave it for the NUC?

#6 - Should I get a LAN add-on module for the NUC so I can connect it that was to NAS, or USB to ethernet adapter? 
E.g. https://www.jw.com.au/product/intel-lan-...o-tall-mdl

#7 - Sonarr, Radarr, Jackett, Overseerr and qBitTorrent using Docker? 
E.g. Swap Jellyfin for Plex from this guide: https://gist.github.com/rickklaasboer/b5...96d8ba2260

#8 - Samba to mount storage permanently? (pretending I know what this means).

#9 - Proxmox. Should I do that? (arr stack)
E.g. https://www.youtube.com/watch?v=g24pD3gA_wA

#10 - Anything I missed? Advice? Thoughts? Resources? 

Thanks for any advice/assistance it is most welcome

[Fate]

To your questions:
#1 yes
#2 if you are new... proxmox has a webgui
#3 gpu passthrough via proxmox is easy this days and qsv is supported by jellyfin
#4 I don't own/like any NAS so I can't answer that.
#5 you can install docker but be aware that CPU is too weak for CPU/GPU intensive tasks. Anything else is probably fine
#6 I don't think a separate network link to the nas is really needed.
#7 Content "acquiring" tools are discourage here. so N/C
#8 SMB is probably fine... iscsi, NFS might be better YMMV
#9 Proxmox is good, you can put each service in an LXC or create one big Docker VM, I would go with whatever you can handle better.
#10 vvv
Well I don't really see the point of buying a 1k+ NAS if all it does is providing storage for a linux/proxmox/docker host. Why not build the storage into your server?
Local storage is almost always faster/cheaper.

Also the i5-1240 might struggle beyond 2-3 4k transcoded treams. If you can directplay that should be no issue.

How about:
8840hs SOC, Intel arc 310, put that + the hard disks into itx chassis of your choice.