Oh bless you. It's very very early days for you all. You are still reeling and yet having to cope with the summer holidays, which can be challenging - though fun too - at the best of times.
If it's not patronising, can I suggest that a simple routine (written down) is your friend? You don't have to stick to it, but it's there for when your head is pounding, or when you need some inspiration. The kids could even help to draw it up.
So buy bags of popcorn/popping corn and get a list of films you can watch this week. At least one a day. Next week, draw up a list for the following week.
Have a simple list of activities to do once a day: swimming, baking, picnics, etc
If you've got a local library, they often do holiday reading challenges, so add in some reading time each day, with sticker rewards if needed for them. And get some books/chocolates for yourself, so that when they read, you get to curl up with a good book too.
Meals- make a list together of favourite meals that the kids can help prepare: fajitas, meat or veg kebabs, home made burgers - all your favourites. . .
Duolingo. Can you all start learning a new language, and challenge yourselves . . .
B
And if that is patronising, ignore me and do what's right for yourselves! There's no right or wrong answers at a time like this.
Best of luck. . .