I just went to the Tokyo Disney Resort in late May this year.
Highly recommend getting the e-book from Tokyo Disney Explorer.
https://tdrexplorer.com/ It's got everything you could need. TouringPlans has also just released their own planning for TDR, but I haven't used that.
Make sure to try the ticket lottery each day for the shows and parade seating. Big Band Beat at TDS is really good, and in English.
I liked trying the different snacks and ice cream treats. Camp Woodchuck had a chicken waffle sandwich I enjoyed, and the restaurant is really detailed. I liked Casbah at TDS.
Gyoza buns at TDS are a must. Delicious.