I would start with a soil test first. See if the soil needs any remediation.We moved last summer from a row home with basically no yard to a single family with about 1/3 Acre mostly all grass.
I know basically nothing about maintaining a nice lawn. Anyone have any good resources to read? In our neighborhood some people have lawns where all the grass is the same shade of green and looks beautiful. Ours does not look like that. I don't know what is involved in getting a lawn to that point or if it's even worth it.
Aeration is important as well.