How do you as a productive person deal with a partner who is not?

I’m a super productive person with some OCD tendencies, and my partner definitely is not - pretty sure he has ADHD actually and trying to get him tested. I came to this conclusion while watching him since he retired - I run my own business and work from home so could see what was going on. I knew he had problems with his work previously, but since he was his own boss there were no real consequences except unhappy clients.

Has anyone else dealt with this in a partner or someone else they work closely with? I’m retiring at the end of the month, and we have a laundry list of projects to do together. I’m looking for any advice that could help at this point.