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