Guide Bushing and Dovetail Jig

I attempted to use the PC Dovetail Jig. I did not get very far - I laid out my panels and started setting up the jig before I A) couldn’t find the 3/4” OD router guide bushing (I found the 5/8” one, and an assortment of others, though) and B) had no idea what I was doing with this ridiculously complicated jig. Would anyone be willing to show me how to use this thing? And, does anyone know where the 3/4” OD guide bushing is?

Thanks so much!

Someone please offer a class!

A dovetail class would be amazing! I hope someone offers it.