Newly Diagnosed and Husband still angry about past behavior

I was diagnosed with ADHD combined type a week and a half ago. My husband suggested it to me 9 months ago. I went for a diagnosis with a psychiatrist and he told me that I don't have it. I gave up. I made an appointment with an ADHD specialist and was told last week that I absolutely have ADHD. I was put on medication and I feel like I'm living for the first time in my life. Everything feels different to me. My husband and I are barely speaking right now. When we do, he yells at me about how much I messed everything up. He has so much anger and resentment for me because of all the issues my ADHD has caused over the years. I can't help it and feel awful. I'm learning everything I can about ADHD, am working on behavior changes, building more structure in my life and reading every book I can about it. I'm doing everything possible to be better.
My husband and I have always had issues, but I never realized that my side of things was caused by ADHD. He actually mentioned divorce yesterday and told me that he's glad I got a diagnosis, but at this point he's over it. I've tried to tell him everything that I'm doing and he says I'm all talk (I made a lot of promises pre-diagnosis that I had every intention of following through with...I just never could) and he'll believe it when he sees it. 
I've made this major, life-changing discovery and it seems to be too little too late. I can make all these significant changes to my life and it may not save my marriage.

He doesn't even want to speak right now. I have no idea what to do next. What is my next step? I don't want to bombard him with requests to talk when he doesn't want to be around me. I feel so lost and so sad.