Welcome aboard Bob, where are you from? I started with a Fisher F22 back in September of 2018. It's a nice machine for finding coins and jewelry. It'll consistently find anything 3-4 inches deep and the small tear-drop shaped coil handles trashy areas like parks and ballfields well. That is what I mainly used it for, hunting clad and jewelry in local parks and ballfields.
A year ago at this time, I graduated to the Minelab Equinox 600 so I could consistenly go deeper and look for older coins and relics. The Equinox has not disappointed.
My two pieces of advice for a newby, 1) do your research; read this site religiously, read other books/articles, watch youtube videos of detectorists to learn tips/tricks/technique AND 2) metal detecting is just like the real estate business, it's all about location, location, location. Do your research to find out where the best places are to find exactly what your hunting for.