Explaining ADHD to my husband

Are there any recommended resources to share with my husband that might help him understand me a little better. He is extremely supportive but sometimes I just feel like he doesn’t get it (understandably) and I want to provide him some helpful information for 1. Understanding and 2. How to help me. He said to me this morning “I get it, sometimes I have a really hard time focusing too” …. And I didn’t know how to explain that it’s so much more than that.