OSC training resources

I've got a rider for a March show that is requesting a ChamSys console, so they can control lighting channels through OSC input into the console (the source originates in the sound console).

My local suppliers don't have a ChamSys console.

I know the Ion has OSC capabilities.

1) can someone point me to a training video for Ion/Eos OSC?

2) can someone give me the basics on how to set-up OSC so something else can trigger Ion through OSC to turn on / off channels?

3) can I test this through a Nomad laptop outputting OSC into my Ion, prior to the show arriving?

Thanks very much.  this one is way out of my field.