I had to ban nannies from my game because my blood pressure would go through the roof when my sims used them. I just don't have any patience for over-the-top STUPID sims in my game. There is a lobonanny mod, I think from maty that is supposed to help. I personally never found a mod to make me feel better about nannies.
For a while, I had friends or family of the soon to pop pregnant sim move in with the sim/family to help take care of the babies and toddlers. Then I had live-in nannies I created in CAS that I used all over my hood to help with the kids. Then I went back to having friends move in. I don't even let many of my sims have kids and it was still exhausting when I did.
Now I just age the kids up and skip the annoying nanny and other frustrating baby/toddler stuff.
On a daily basis, my sims can expect to have to work in the garden and make new friends when they aren't learning skills.
Oh, and for the sims that have produce to harvest, they can expect to drink a lot of pepper punch in their lifetime so they can stay up all night and do stuff like make craftables, entertain friends, cook group meals for hours to put in their inventories and spend some time being amazed and thanking me endlessly for the variety of community lots I've made to keep them entertained after they have caught up with their chores.