@wh2 Tip1, don’t cook, so that you don’t have dishes pile up. At least take out, or microwave food for some day in a week. Tip2, let the kids do laundries (above 2yr old). At the beginning, it will be forever to let them put the laundry in the washing machine, but after a while, they will put them in properly. 3yo can fold laundries, but not very efficient, and it will take a long time to train them. Tip3, organize toys. Just put several toys out for kids to play, and rotate them. Organizing is hard work, but you can do it during weekends. Tip4, ask help for deep cleaning. That’s once/twice a month thing, clean the bathrooms and kitchen. Ask somebody else to take care of kids for a few hours or hire some cleaning lady to do the cleaning.
If you cannot get the extra help, or don’t have enough money for takeouts, just let it be. Keeping a house organized needs time, and taking care of kids need time, housework plus child care needs more than 60hr/week. That’s overwhelmingly for anybody.