I'm going to give you the best advise about lawn care that you will ever read.
Cut it tall. Raise your mower deck as high as it goes. If you are even slightly handy, fab it up to be even taller.
Here's pic of my lawn on the left, and my neighbors lawn on the right:
The difference is I cut my lawn at about 5", and his is about 1". I don't water my lawn, I only fertilized once this year, I don't use herbicides or pesticides.
Guess what? Your grass hates being short. When you cut it short, the roots die back. When the roots die back, the grass can't tolerate drought. When your grass is short, weeds take over. Then you go to the store and spend ridiculous amounts of money on weed killer and fertilizer.
I'm no lawn guru, I'm just sayin'.