Would recommend making a plan, but it doesn't need to be stressful! Here's my short rundown:
MK: I'd say 7DMT is the only must-have. The others can be dispersed between your favorite Mountain, or maybe Peter Pan/M&Gs if that's your kid's kind of thing.
EPCOT: Frozen, which I assume the kids want. Note that you don't have to book the same FPs for everyone in your party, so if some of the 4 adults would rather ride Soarin' or Test Track, grab those for them. The Tier 2 FPs really don't matter much, so I'd just pick things you know you'd like to do.
HS: Toy Story Mania is the must-have, unless someone really loves Rock n Rollercoaster. Tier 2, I'd pick Tower Terror & Star Tours. Shows really don't require FP, but if you don't like some of the above rides, it wouldn't hurt to secure one for Fantasmic I guess.
AK: Safari. We've found short waits at Expedition Everest and DINOSAUR on most occasions, so take that for what you will and the rest can be narrowed down by your party's preferences.
My 60 days passed recently and even though I knew what I wanted, I still found the interface on MDE to be annoying and counterintuitive at times. If you want to get a better idea of what the process is like, maybe do some research online or watch Youtube videos (?) not sure if anything like that is up, but it might help. Just take deep breaths and click away! Good luck, hope this helped!