First off; you can't do everything. Just not possible on a 4 night. Do the research on Wish here and at the
DCL website to see what's available. What are your family's priorities? Do you have littles or teens? Do you and your partner like upscale dining? Is fun in the sun your priority or 'inside activities' (e.g. trivia games, magician acts, live music...)?
That's what we've done successfully for many many cruises.
Tips: bring more than enough sunscreen. They charge a king's ransom for sunscreen. Same for a First Aid kit. We always decorate our door in a unique way using crafts with magnets glued on. It's fun and helps us find our door. They all look the same!

Go to the shows; they're amazing. If you're introverts and would rather not share a dinner table with another family (or 2), you can request solo dining. It's only a request, but in our 27 cruises, we've only had it not honored once. I load funds into the onboard account to cover our spends. Internet connection, alcohol, port adventures and all that. Circling back to 'what's your priorities', I figure out what the cost will be and pre-purchase onboard credit (you can do that through the DCL site/app. That reminds me: download the app. It's where the ship's schedule, your onboard account and everything else can be found. On that note, if you're enjoying the cruise, purchase a placeholder for your next cruise. When you get home, y'all can figure out what your next vacay will be, call DCL with the placeholder number and you get 10% of the cruise and a reduced minimum deposit. If you don't use the placeholder, the money is refunded to you (I think it's 2 years, but I forget. I've never had one refunded!).
There's so much more. Most importantly: have fun. DCL cruises are like those potato chips, you can't have just one