Robert, your lawn doesn't look like the grass is being mowed high enough. At least, that is what it looks like. Maybe it is just not growing.
I am by no means an expert, and am new here myself, but I can tell you that the difference in my lawn has been dramatic. And in such a short time too. Outside of the watering for the initial reseeding of the bare spots, I have not watered my lawn yet this year. I am also in Zone 6 in NY.
Here is the link to my story, if you have the time to check it out. Look at the pics of before (May2nd) ,and after (May28), and read what I did. It wasn't that hard to do.
https://permies.com/permaculture-forums/3841_0/lawn-care/help Al