If you can get hold of a 1266 X Fisher detector.They are an older detector. But, they are deeper than a lot of the newer high dollar detectors.
Ask permission to hunt any old house's farm land. They are all ways good site to hunt.
Welcome to T-net!
You may want to try posting here....... Minnesota
I'm sure you'll meet someone from your area but if you don't, I'm in Winnipeg if you want to go for a bit of a drive.
I don't recommend getting a 1266X as that's too much of a machine for most to handle, never mind a beginner.
The amount of audio information it provides would drive most people mad!
Look around and you'll see many good entry level detectors out there.
Cheers,
Dave.