A good Dom should never use silence as a punishment. You would learn nothing from that other then to move on because you can survive without them. Communication is a huge part of bdsm weither it's online or in person. He probably was into the fantasy of bdsm but was scared to actually meet up...
The more information you put the better chance you have of finding someone. Your kinks, your limits, even things you are not sure about but willing to try. Any available toys you have would also help potential mistresses.
I think subzerrro idea to find another sub to talk to, Vent to, may help a lot. It may give you the support from the relationship that you need without the pressure to perform no pressure to jump into a relationship just a friend that understands the wants and needs of this lifestyle that you...
Sounds like you have a very attentive and loving mistress. Hope your Daddy enjoys your new marks as much as you do. Maybe he will add a few more for you so you can feel extra loved
For me it has changed as to what I want. Because I am learning as I go. I am still new to this. I have seen what others have tried and if it peeks my interest I talk to my Dom about it and we try it. Do not ever be afraid to try something and say no that's just not my thing.