Marigold, you are not crap or rubbish, you are brilliant to manage twins and your ds. Have some
It took me a long time to stumble on a system that worked for me.
I have 4dcs, all two years apart, now ranging from 13 to 6. I made a list of morning things to do, and after school things to do, one for myself and one for the the dcs years ago. They didn't have times specified, but the idea was that when you'd done your list you could do whatever you want, (except screen time which we limit depending on the day and no screen time in the morning).
We had them on the wall for years, it worked so well that they don't need any input in the morning at all now, and the main homework support I do is to ask spellings or time tables at random times. Once it is routine, and one thing leads to another, it doesn't feel like a lot to do, just what you do in the morning.
So for Dcs
Breakfast
Wash
teeth
dressed
Pack lunch in bag
School bag ready
Check tidy room
Music practice -short
for me
Breakfast
Make lunches
Plan dinner
Dishwasher on
Washing on
Dress /wash
After school
Dcs
Lunch box to kitchen
School letters to kitchen
Snack
Homework
Longer music practice
Dinner 6.15 all family
me
Snack
Deal with school letters
Help if necessary with homework
Dishwasher
Washing
Dinner
The older ones do some of my list now, like the dishwasher and producing washing. They see me doing it and just join in.
Ooops, that was long, but you did ask...