Does anyone besides me not think " the good stuff" is limited to coins? People were poor. How many times have you lost a $20 bill? Not too often, because it's valuable . People wouldn't carelessly drop coins like we do today, it'd be a much bigger loss back then.
I have to say if your discouraged after 6 times out , this may not be the hobby for you. No offense meant. I have the same equipment as you and have put in Probably 500 hours in 2 years with it... I'm still tweaking and learning.
I've found some nice things, but I have found buckets of Scrap metal and trash. I have found nothing of great value , but that's not my goal.
You need to almost have an archeologist gene in you to really enjoy the hobby. It's a lot more looking n seeking than actually finding that never before seen dinosaur discovery . You need to enjoy the hunt, tbe outdoors, accept that more times than not your going to come home with rusty stuff , matchbox cars, and some modern coins. And rejoice on the days you find something you find really special . And it does not have to have money value to be a treasure!
Also nearly anything you find is not going to be pristine. Your going to find things alittle beat up n distorted .. There are almost always The same object in someone's grandfather's drawer that is in pristine condition and will make the value of yours quite unimpressed . The treasure is that you saved it from the earth .. Had you not found it, it would have been lost to the elements .