My wife is into BDSM but I am new to it. What are some ways I can help to turn her on?

My wife and I have been married a little under a year, and together for roughly 4 years before that. She has always expressed to me that she is into being a sub. I don't have any problem being the dom, but my issue is that I have a hard time getting her in the mood.

We've had multiple conversations on the topic, and despite my best efforts to be a good dom, at the end of the day I don't think I'm aggressive enough in the moment to really make my partner feel like a sub.

I'm looking for any and all suggestions that can help improve our life in the bedroom. Only using a throwaway because my wife is also a redditor.