Knowing what you are getting really does help. It will be different than AK on a smaller ship. Just having the pool deck used for sunbathing will be different.
Check out Royal Caribbean Blog or watch some YouTube videos about Oasis to get some insight. Some videos are helpful, others I FF through.
Actually, the RCCL app or website can be helpful.
Know that booking activities opens earlier than on Disney.
Look for info on dining options and activities/shows - specifically if you need a reservation for anything.
We are early diners and did not have a problem nor long wait for a table (and getting the same table and servers, though not assigned, was similar to a Disney experience).
You do check-out beach/pool towels - and need to check them back in to avoid a (hefty) room charge. Just don’t be careless.
My complaints about Royal were smoke (a lot of ships have new rules and better circulation), itinerary (that was my mistake) and lack of launderette (if I had known, we would have packed differently).
If you were to look up Royal for concerns, the biggest would be “chair hogs.”
Across the fleet, this seems to be a never-ending war. Guests go out very early and claim a sun lounger - then head to breakfast or back to the room…
Your itinerary sounds great. Both Aruba and Curaçao are easy to visit. And docking at Coco Cay beats tendering at many of the private islands.
The water theater is a unique and different entertainment option.