Any suggestion to how dirt ground is
prepaired to use for driveway located in
the yard,the area is a 20x30 space, the
ground is very hard, the drainage is not
good on this part of yard.
What would be the steps involved? would
like to use a loose fill product
peagravel,limestone ect.

Shoes,

You definitely want to use peagravel, torpedo gravel or such under the concrete. Don't use limestone.

How deep?? Not sure about a driveway. Call a local cement company and ask them. They cann tell you the code specifics for your area.

what does this have to do with carpentry and woodworking?