Hey Goodstein,
Welcome. Isn't it interesting that our situations always feel so incredibly unique, and then you come here and realize it is almost on reset? I still find that incredible. I am fairly new to the board. But I have benefited from some key advise that I will paraphrase. Do not do what you think is reasonable, but act with reason.
Long timers like JWfacts are right. Remember, with years in, free thinking or not, its always self excused. If you come on, the wall goes up. Better to "confide" in him your problem with something indefensible such as blood. Ask questions so he looks into things he may not otherwise. Suggest implications to him. See where it goes. Don't be in a rush.
I understand your desire to teach scripture. I am in a similar boat as you are in that regard. The truth is, it is almost impossible to maintain personal integrity AND be a speaker in a congregation. Why? Because you are a rep for the GB up there. Even if you do a very good job on a part that does not conflict with your newly freed Christian conscience, all glory goes to those that wrote your outline. Feel me?
I have respect for anyone with a well-considered opinion who also respects those who disagree with them.
Your comment above is fantastic. This should be all of our mentality. But even the most liberal of congregations, does not reflect this simple reasonable statement. They all consider the same material. Some halls just look the other way for the sake of reason. Good for them. It is subject to change with any new CO visit, or new elder that roles into town. i'm sure you've seen it.
You are in a better position than most. Plan well, and be patient. If you want to tell others about Jesus and his father, better to first decide what your message is.