Sexual advice needed, please! 🙈

I am very into bdsm and my husband knows this. He often gives into this fantasy and almost obsession of mine and will tie me up, light choking, spanking, and incredibly dirty talk. I'm so grateful he does these things for me, but I want to take it to the next level. Different kinds of ties, different places to tie up, gagging, etc. Anyone have any experience with this? I've mentioned to him a few times that I'd like to go deeper into this life, but how do I bring it up more? How can I help him to see what I mean?