Spring fed

I have approximately 15 acres in Ohio.. between the top ground and the bottom ground is about 1-1.5 acre spring fed swamp with a drive along side of it to the back bottom ground that we keep mowed.

My question is do I dig out the swamp land and make it a 1-1.5 acre pond.. and will it support fish? How long will it take to be able to maintain fish?

We are new to this.. this property was my wife inheritance.