1. In the middle of the one of the worst droughts in the recorded history for this area you killed all the ground cover on your yard? 😕 Ever hear of the dust bowl?
2. Don't bother trying to grow anything until spring. As Ronstang mentioned, the grass is all dormant at this time of year, especially with how cool it is right now. You could mess with winter rye, but it'll still require quite a bit of water and will die off in the spring/summer.
On a side note, it seems as though a lot of posters think Texas is a huge desert. We are in a drought, but the Austin area isn't a place where grass isn't "supposed to grow"...