I don't want to sound like I am giving relationship advice...so please don't take it that way
If he is a laid back guy he might enjoy a more low key visit? Not Uber planned.
I am not an Uber planner. We usually only do 2 table service a visit. I picked fast passes the last trip...but didn't get around to it til a week or 2 after I could start making them.
I.am a very organized ocd person in real life...but it's nice to have a break from that.
Maybe take at least one day and just "go with the flow"...wake up and say where do you wanna go today? What do you wanna eat ?(there is some great quick serve out there) have some spontaneity. Something sadly missing at wdw.
I would hate someone first trip to be over planned and thus not enjoyable. Disney can be super overwhelming to adults as much as kids. We have gone with friends and I found myself fretting the whole time.hoping they were enjoying it. That is not a fun feeling. So maybe give him some of the planning parts so he has a say in what he wants to do.
Just my 2 cents. I am very different from most on the boards. I like the rides...but I like the experience of the parks just as much. Just wandering around. Finding fun picture spots, watching the entertainment in epcot (if anything is left haha), be a silly kid on the teacups and ham it up on dumbo
Most of all enjoy your trip