Sorry to overwhelm you you on day 1, but I have to say you are certainly a fast learner and you did an excellent job concentarting on the spinnaker, it gets easier after "learning the ropes". But then it gets harder again when you step up the game with the big guns,its like being a beginner again.
Sailing is a sport that allows you to continue to learn everytime you go out. You never know it all, and thats what keeps us hooked.

here is my opinion on the 2 part question posted originally in this post.
1 How do you teach someone to sail?
Patience, time on the water, preferably on a few different boats and with more than one teacher.
If you want to learn more about sailing and already have a boat, go racing. You can ask questions and see how people are setting up their boat, than how they sail it on the water.

2 How do you get people into sailing?
Invite them to crew, or help with RC. Even just inviting them to a regatta, if just for the party, it will allow them see the passion that people have for this sport, and maybe it will spark their interest in it too.

My 2 cents