Hello,

 The "Douglas County Permanent Mix", available from the Douglas County Conservation District, is a good mix of native species that do well in most parts of the county with no supplemental irrigation past establishment.  This could be drilled or broadcast now for germination in spring; if broadcasting be sure that the seed has good contact with the soil by harrowing (or raking in smaller areas).  You want the seeds to be 1/4-1/2" deep.  Moisture retention can be improved by covering with a straw blanket, thin mulch,  or similar material.

You will need to be diligent about controlling the weeds during the first few years of grass establishment. Weed control reduces competition for light, water, and nutrients  so the grass seedlings have the best opportunity to grow.
Mow every month during each growing season for weed control, about 3-5 times a year. Set the mower to 4-6” high, no lower. Do not use herbicides shortly after planting, or until grasses are grown past the three-leaf stage, because herbicide may hurt the establishing grass seedlings.  This can be as long as 3 years.

Exclude animals until grasses are well established. For irrigated areas, grasses may establish the first year. For non-irrigated areas, grasses can take 3-5 years to establish. Adequate establishment for dryland grasses is considered to be about 3 plants per square foot. 

If weed pressure in the area is high, you could consider using a cover crop like sterile sorghum, foxtail millet, triticale, or cereal rye to anchor the soil and out-compete weeds during the 2025 growing season; sowing the permanent grass mix into the stubble from the cover crop.

I hope this is helpful.

Cordially,

John