I highly recommend Island Living for this time of year as @SheriGR says it has some great features. When it's absolutely pouring down rain outside it helps cheer me up!
When I'm looking for a challenge for my Sims I shipwreck them on one of the deserted islands with no funds and they fish and harvest island plants to survive. I usually combine it with the Making Money Scenario. I get them to Snorkel and Scuba Dive to find treasure and shells. Snorkeling in first person camera view is amazing, it's like you are snorkeling with your Sim! You can see under the water and watch the wildlife, check out the underwater coral reef and see there is just as much beautiful detail under the water as there is on the land. 🏝️
It does help that you have one of my other favourite packs, Outdoor Retreat to have camping gear. If you move into the Admiral's Wreckage lot it's an actual shipwreck.
It comes with new personality traits Child of the Islands and Child of the Ocean, I don't use the latter that much as it means they get upset while fishing or eating fish and that's no good for my shipwrecked Sims. But I do use it for Mermaids and scuba divers (it stops the sharks from eating them).
They can clear up the trash around the island and beachcomb too to improve the environment. So there's a lot to keep you busy. Plus...dolphins! 🐬