I echo the PPs that everyone has to have chores. Age appropriate of course. Everyone can put their rubbish in the bin. Toddlers can pair socks, in fact mine used to love it.
The house doesn't have to be spotless all the time and no one cares if you've done all the ironing (or indeed any of it). Well some people might care. Ignore them
If you're tired go to bed when the DC do. When I first became a single mum (12 years ago) I used to go to bed with the DC. We'd all snuggle in my bed and play "who can be still and quiet the longest".
Have emergency childcare in place. And back up childcare. And back up to the back up. (If you can)
Keep a stash of long life milk just in case you run out overnight. You can still have a morning coffee/tea and cereal.
If you have a local "community" then tap into that. My church is really good for this. It's attached to the primary school and has a term time coffee morning after drop off, with no religious expectation at all. I've made some amazing friends there and still pop in most days even though my youngest left the school 5 years ago.
Be kind to yourself. Single parenting is tough but you can do it!
Make sure they know who and how to contact someone in an emergency. Mine could unlock my phone and knew how to call my Mum and 999. I'd also arranged with a couple of neighbours that the DC could knock on their door and they'd also come and help. I think the system was
DC1 - go to neighbour and bring them to ours.
DC2 - call Grandma and tell her it's an emergency. Then hang up and call 999.
My boys are teens now and they often tell me how proud they are of everything I've done. I was in a 2.5 year relationship, which sadly ended 2 years ago. While I sobbed my heart out, my boys wrapped their arms around me and one of them said "we've always been just fine with us 3. We'll be just fine again"
Parenting isn't a competition. Children don't need billions of new things every Christmas. One of our favourite years was a couple of years ago. We'd always spent Christmas with my mum, but as I was no longer single she booked to go on holiday thinking we'd be with DP. We split up the day she booked the holiday
. I was skint, severely depressed and generally fed up. I spent my very small budget on some new (to us) board games and a dvd or 2. We had such a brilliant day playing games. Low key and perfect.