I'll just throw out some ideas here, don't know if anything will be useful:

You read the information and it fits you, so I'd say that it is real. It is real for other people too.

What is important is your real experience.

Yes, this is still seen as theory etc. by others, but it is important to you.

Even if say you end up working on NPD with a therapist and not strictly CNPD, there are still many things you can learn and try. Cognitive behavioral therapy can be tailored to your needs, no matter what.

I think it is cool that you found something that you recognize in yourself. You get to try things out, experiment, get good help, develop your own goals.

The first step of knowing where you are is a big deal. You have an excellent place to work from.