I think it takes a proper sit down discussion to share views, hopes, worries, etc. I think it comes down to him not wanting to hurt you or cause further trauma, but he really needs to know how you feel about it which you are really educated and self aware and that's really good!! He just needs to see this and know you've done your research and self exploration.

When I was in my last relationship, it wasn't sexual (my ex was a repulsed asexual, I am just asexual and eh not a big deal) and when I wanted to explore the dynamics of D/s relationships, I'd bring up factors and she was curious but wouldn't get too far into it. It's when I sat down with her and explained what we could both get out of it (she was naturally dominant) she agreed it would be something enjoyable and therapeutic and asked for time to conduct her own research on it.

After two weeks, we tried it, and both enjoyed it immensely.

I think you have it down with how you want to approach communication. I think you're going about this the right way. I do think it is important to have an extended discussion about it and give him time to process these ideas and do his own reading into the topic.