I can’t make it dummy proof but it is really simple.
I’ll assume you made a share for Downloads
(not public) and one for Multimedia
(probably public in your network).
Based on Docker
mkdir -p /shares/Volume_1/Nas_Prog/sonarr
docker create \
--name sonarr \
-p 8989:8989 \
-v /etc/localtime:/etc/localtime:ro \
-v /shares/Volume_1/Nas_Prog/sonarr:/config \
-v /shares/Multimedia/TV:/tv \
-v /shares/Downloads:/downloads \
linuxserver/sonarr
And to fix reboot behavior do this.
Or just use my new docker package.