Talk about it. It doesn’t take a lot of complicated gear or anything. Just play around a little. Get him on his hands and knees. Play with him like a puppy. Scratch his ears. Tell him to roll over. Just little cute things like that. Start experiencing the headspace before you incorporate the BDSM aspect of it. The affectionate and understanding side of the dynamic is just as (if not more) important than the Dominant/submissive. Build trust. Then start to get deeper into it.