I've done it quite a bit off and on over the years and regardless of what detector you choose, I would strongly suggest that you buy through KellyCO out of FL. Great products, great prices and great customer service.
In addition to a detector I would also suggest that you get a Garrett pinpointer, they are about $100.00 and are indispensable in the field.
Here is a link to one of my favorite detectors:
https://www.kellycodetectors.com/cat...tra-series-vx3
Also, there are some very good detecting forums that are a great source for learning.