first you will have to drive caseing down till you set it on a hard rock.then drill that out through the rock. when you break through the rock , you should have water.

thats the way we do it in and around our hunt camps. we have drilled 8 or 9 over the years.some it only took a weekend, others it took several weekends to get water.depends on how thick the rock , and how far it is to the water table.
lots of work, good luck , hope you get water soon.