To give you a bit of hope, we have NEVER planned a trip more than 2 months in advance, and mostly about 1-1.5 months. We have managed to eat every place we wanted to except..........Le Cellier.
What we do is figure out where we REALLY want to eat. Get those ADRs, then plan the parks etc around those, then fill in the remaining ADRs. Granted, we have kids so we like to eat early and there seems to be a better opportunity to get early ADRs.
So, a few suggestions......
1. Citricos. Go here. Our best dinner ever at WDW, one of the top meals anywhere.
2. Artist Pointe We thought nothing could knock this out of the top spot, still an awesome place to eat. Go here. I feel the mushroom soup could stand up anyplace.
Both of these are higher end restaurants and would be great on a honeymoon. ( I just asked my wife and she mentioned these 2 first.)
A few others we love and some are easy ADRs.....
1. Olivia's We feel this is the hidden gem at WDW. Easy ADR.
2. Yak and Yeti. Surprisingly good.
3. Hoop Dee Do Love this place. Might be a bit tough, try early.
My wife likes some Epcot that might be easy...like Germany and Norway.
Good luck, and congrats!