The BDSM scene can be very complex, submissives can be very demanding if you are domming them, there
is a lot of technical/technique/ritual play to know. I started out as a domme and worked independently doing mostly outcalls. My method was to use lots of theatre to shock and awe them, the better I looked, the more outrageous I could be the more they loved it, I picked up the vocabulary as I went along, and built up outfits,equipment and toys that I'd wheel in a roller suitcase. As far I was concerned it was about giving them exactly what they wanted and blowing thier minds, and as a mistress I controlled every element of the sessions. I drew the line at blood play and scat, and instead wrote my own script of delicious tortures that would have them on their knees in adoration....God I miss it..!!! I finished it because the Mistress scene is so flooded, but still keep my dominatrix website.
My advice is to visit lots of bdsm sites, talk to some mistresses, and start simply doing tie and tease and build up your repertoire, its immense fun!