I think I can relate to the dilemma your husband is trapped with. We have been taught to treat girls with respect. World would have been far worse otherwise. I am 25. I don’t have any friends who would willingly admit they like BDSM. I have to admit, I don’t like really serious, hardcore stuff. But still I do admit I like domination. In your case, you have already taken the first step. You know that your husband likes to have control. So problem is half solved. Now it is your job to lead him if you want to bring him out of his shell. Submit yourself before him. Make him feel comfortable with the whole thing. Then the ball is in his court. Don’t egg him to do this and that. Let him take control. You will have to be patient. Sometimes self-bondage, switching off the lights, or blindfolding yourself might help. He might be really shy to admit to you that he too likes it. He might not want you to see his expressions. Smiles and reassurances will help. I am sure he will become a very good dom soon

Once you have your husband on your side, things are easier. Two brains are better than one. You will find a lot of posts (a lot of expert ones by denuseri) in the forums on how to be secretive about it.

PS: I don’t have any real life experience in this. I have fantasized a lot. But I did face some reluctance about a lot of things while roleplaying(!!!) especially when you like/love the person on the other end. Also I guess from your name that you are Indian.
Your husband loves you. There are a lot of wonderful things he would do to keep you happy. TC

Good luck.