@Alittlelostinlifeisi
You sound so overwhelmed. Take a deep breath, you can do this.
You need to establish a routine, so that things get done as a matter of course.
Kids - they really need at the very least a good stand up wash every day. The easiest thing would be to bung them in the shower for a couple of minutes before bedtime so that it becomes part of their routine of getting ready for bed.
Your older ones are big enough to help you, so they can help make their bed, put clean washing away, fold their clothes, put pots away, clear the table, fill the dishwasher.
Your youngest, can help put toys away, tidy shoes, lay the table, put their clothes away
They can all put dirty clothes in the wash basket, hang up coats and bags, put their own shoes away.
Cleaning. I would really recommend that you take a look at TOMM. Basically 2 levels of cleaning a day. Level 1 takes 15 minutes (not all in one go) and is putting a load of washing on, clean some part of the bathroom, hoover /mop heavily used floorspace.
Level 2 is half an hour cleaning a specific area, such as living room Monday, bedroom Tuesday, hall/stairs, Wednesday, kitchen Thursday and the game changer is a focused Friday where you deep clean one of the rooms in turn. Put a timer on and stop after 30 minutes. What you doing do this week, gets picked up next week. Over time you get faster and your house gets cleaner as much never really piles up.
There are free tick lists or you can pay for an app. Gemma does guided cleans so if you don't know what to do, she talks you through it.
The whole idea behind it, is that you spend time during the week following the plan and then the weekends are yours and free to do what you want. It is life changing if you commit to it.
I get up half an hour before anyone else in the morning, so that I can crack on with whatever room I'm doing that day and sit down with a cup of coffee before every one else's day begins, but you might find it easier to do it once the kids have gone to bed, or whilst they are having tea or in the shower.
You clearly want to do something about the way you are living. You sound a bit down and overwhelmed. Just take baby steps and you will get there.
Alternatively if you have spare cash, you could get a cleaner in to do a deep clean and then try TOMM, or you could just get a cleaner in every week to sort it all out for you.