28/m married here, interested in starting up some sub/dom play

In my case I (the female) was the dominant and my partner (the male) was the submissive. He was curious how to get into it but was really shy about it. We kept up a good d/s dynamic for 4 years. It's all about educating yourself on the role you play and what to do and no do, there are a ton of forums and educational sites for aspiring dominants. Don't run in guns a blazing with her, start off slow and introduce her to things with an ease, let her know what is going on, give a safe word and respect it at all times. If you are going to get into flogging or spanking learn the spots of the body to avoid hitting as they can cause damage. If you are into breath play start off by softly applying pressure at the sides of her throat gradually adding on more pressure. If you are into giving orders again start off slow and see how she responds, a lot of people get shy in that position so give stern but kind encouragement.

A lot of it is just dipping your toe in and seeing how it feels, paying attention to her general reactions and a lot A LOT of communication.