There's no one way or right way to go about it. I'd be wary of anyone who tells you how you should have sex or how you should be submissive or dominant.
I'd start by talking to each other about your fantasies and ideas, and trying out different activities that you both feel comfortable with.
This webpage has a list of scenarios to spark your imagination, and aside from the top banner it doesn't have any porn images.

There are lots more BDSM resources online, whether you're looking for techniques, safety tips, or other people to shares ideas with. Have fun experimenting!
No diagnosis, lots of opinions, and a bunch of issues that I haven't quite figured out.