I have poor soil in my yard too (dry, clay, sandy), and I went with white clover years back in the bald areas where it was hard to keep any grass alive. It did grow and cover the ground when I watered it regularly. But, it had to be redone every couple of years because it didn't last like grass does.
Another thing is we have a big open area behind our back yard, and the clover attracted rabbits and bees, so we were overrun with rabbits and had to step carefully in the yard because of the bees on the ground. It also is not ideal for picking up after the dog, since it has long stringy runners. Also heard that fertilizer, we use natural, will kill the clover because it's considered a weed, not sure if that's true.
Needless to say, I gave up on the clover and the grass for the last few years. I have a small area of grass and I just try and keep that alive without too much watering. They do sell native grasses which don't require too much water, but they are sold in small bags and very expensive. My front lawn we just put in volcanic rock many years ago and haven't had to fuss with it except for pulling some weeds in spring and summer.