Starting a lawn or plugging in to fill in a thin lawn area is not difficult. Basically you want to rototill the soil a few inches deep and then lay sod, roll it to make good contact with the soil and water it in well. Then keep it moist with daily watering for about 10 days or so and gradually back off to every 5 days until cooler fall weather makes watering unnecessary.
The following website offers more info on turf and establishing a lawn than we can fit in this brief reply:
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