I have 2 that are less than a year apart and I have (somewhat) got it under control...
I have a bit ottoman with toys in so it means toys go out then toys go back in at the end of the day, no organising involved
Craft stuff is kept in a box away from them and I have a washable mat to put on the table for those activities
I vacuum daily so it doesn’t get gross and it means it only takes 5 minutes (I also have 6 cats so it needs doing anyway)
I taught my kids to sit at the table to eat from about 2 so they got used to eat rather than booster seats etc and to clean their own plates away into the kitchen
I get their cereal ready the morning before (without the milk obv) with spoons so I can drag myself into the kitchen and it’s all ready for me
I do washing up when they’re in bed so everything is clean for the next day rather than leaving it for me to face tomorrow
A washing basket in their room that they put their dirty clothes in themselves- start training them now!
I fill up a big bottle of water, put it in the fridge over night then get it out in the morning so if the kids say ‘I’m thirsty’ I can just grab the bottle from beside me and fill their cups up rather than run to the tap every time while I’m doing work/on laptop etc
I wipe down table surface with homemade spray mixture of liquid washing detergent and water- it’s great at cleaning tough stains from your table and leaves the room smelling good (I have a cheap table though, if you have a wood/glazed table I’m not sure what would work better)
We make their beds first thing so it’s done for the night
Mattress pee pads under sheets on mattresses are a life saver!
I have candles, and Reed diffusers around the house to make it smell nice and look nice- it takes away the ‘Theres kids running riot’ look away from certain corners of the house (there are some gorgeous ones at Asda atm half price if you’re after a reed diffuser that’s really fancy!)
I organise all their clothes by tops in one drawer, trousers in another and pants and socks in another so I can just grab and go (being so close in age they wear the same clothes- younger one is a chonker!)
Also dusting- it makes things look tidy and looked after and it’s minimal effort- I just use the extension hose on my vacuum to get to the corners
Also I regularly go through their toys and throw away. If it can’t fit in certain boxes (a big box in their room and the big ottoman) then it goes (this doesn’t count books btw I keep them separate)
I live in a small house so have to be smart about storage- also Ikea do great cheap under bed storage for stuff like winter clothes when you don’t need them and summer clothes so you can rotate them
Overall I’d say if you’re overwhelmed, don’t beat yourself up. My house was a mess when my two were that age. It took me a long time to get a grip on it. Just do one thing a day, even if it’s just wiping down a table or tidying up some toys- it’ll make you feel much better.
You’re doing great op :)