A Few Questions About MD

The higher range models normally offer better discrimination & depth. This 'may' obviously increase your finds whilst decreasing your time spent digging up ring pulls & such. If you're new to MD'ing then I'd suggest not aiming for a top of the range model but to start with a more moderate entry level machine as has been previously suggested. Get to know your detector, it's limitations & interpret what finds produce what signals/sounds.
Parks, beaches & gardens are good for finds but maybe you wanna be a bit more adventurous by searching out older sites through your library or local history associations. There's tonnes of stuff in the ground just waiting to be found & if you do a bit of homework on where to look you'll possibly end up with more finds. Good luck.

I am still relatively new to metal detecting, my wife actual bought me the detector for Christmas a couple years ago. That does not stop her from calling me a Geek. I call it Geek Appeal.

I have tried parks several times, but I find I am digging up hundreds of old beer pull-tabs more than anything else. No coins, the old timers must have been too busy buying beer with their coins to drop a couple.

I plan on trying the beaches near my home soon, since the metal detecting season just started. (They have rules about MD during the swimming months).

One word of advice. To avoid further name calling from your wife, Do Not and I mean Do Not come running into the house in uncontrollable excitement because you made your first find of a 1986 penny in your back yard. I am still trying to live that one down.