Hi Scott - and welcome to the Forum! We have lots of experienced poly folks here who are generally friendly and helpful. I would encourage you to post your specific thoughts and questions on the General Poly Discussion and Poly Relationships Corner - both of which are quite active.
I will personally commend you on your reading and research. In my case, my wife asked me to transition our marriage to poly about 18 months ago so that she could ethically explore her resurgent feelings for an old college boyfriend. I ultimately agreed (full story in sig link below), and extensive reading on the subject of polyamory was one of the keys to my ability to make the transition. I would highly recommend "Opening Up: A Guide To Creating and Sustaining Open Relationships" by Tristan Taormino. It is somewhat dated in its technological references and does not discuss "recent" poly terms such as metamour and compersion, but the author does an excellent job in introducing the larger sphere of consensual non-monogamy, placing poly within that sphere, and then covering a basic intro to general poly principles. It is the book I would most recommend to the person interested in the poly lifestyle. Also, I really appreciated "Eight Things I Wish I'd Known About Polyamory: Before I Tried It and Frakked It Up" by Minx M (Cunning Minx of the the Polyamory Weekly Blog and podcast site). It's only a hundred pages or so and a great poly starter. If you haven't already, you also want to check out her website. She's been producing regular podcasts on polyamory for a dozen years with over 500 free archived podcasts.
Again, welcome, and best of luck on your journey. Al