ADVICE on marriage when you both have ADHD?

I have a double whammy in my marriage! - I am recently diagnosed at 53 (and medicated) and my husband (62) has been diagnosed but refuses to accept he has any responsibility to change.

I read a lot on here about one spouse having ADHD and the effects this has, but I can't seem to find any support for us to navigate our relationship.

Any pointers?