Recently Diagnosed and Confused.

This is something that me and my family have been trying to get for the majority of my life, A diagnosis.

I've recently turned 17 and have finally, after years of fighting, Got diagnosed with Autism and even though I'm obviously happy that I finally have the diagnosis, I'm a little down. I couldn't even bring myself to read the report that got sent back to explain my diagnosis and the different ways that people and myself can help me, It was 16 pages and the few pages I did read just didn't make sense and didn't sound like anything, If that makes sense. My Dad read it quickly and quietly, He didn't really explain much to me just said that it said I had Autism which was something I knew already because my Mum told me that part of it said this. I feel a little alone because even though, As I'm writing this, I'm with my Mum at her house, I live with someone who doesn't really understand this stuff and usually just ignores it or gets very frustrated when it comes to this kind of thing. 

I'm honestly just wondering if this is a normal feeling when you first get diagnosed or not? And if anyone knows how to help a parent to understand a little better even when you don't understand it yourself.