I made a short video demonstration of my
OpenCPN setup:
https://youtu.be/n1xVVpdjrG4
You can find a write-up of the
project with a lot of technical details on:
https://sailingcourage.xyz/projects/plotter/
I hope this is useful to others who are looking to make a similar setup

This is my first post here, but I found a lot of very useful information on this Forum while designing my system.