Children of NPD parents are hyper aware of what other people think, are extremely critical of themselves, and very image conscious. Personally, this is where I would dig in. I know that in my twenties I survived with serious anxiety by being a know it all and a fierce bitch. I didn't have the money for labels, but I knew how to dress and act to make people look at me and yet not talk to me.
This stuff is your mom talking. BTDT. I've been pleasantly surprised at how much my life opened up since I started dropping veils.