Your best bet to start getting the hang of finding silver coins, is to start at a place where the "pickens are good"

Because if you simply go to the old tired hammered parks and schools, odds are, they've been cherry-picked over. So start with virgin territory, and then ... after you've dug some deeper easier clean signals, the lights will start to go on. Then you can take those same audio clues, and apply them to the more difficult competitive turfed parks and schools.
The best place to find un-hunted cleaner turf, is to hit yards. Yes it will mean knocking on doors, so that's another subject

Don't go to the wickedly old yards in your town either. Because they'll likely just have more generations of iron, etc... For starters, go to the post WWII era homes (late '40s early '50s tract house era homes). Those yards will be old enough to have silver, yet new enough to have been avoided by hard-core aces (who shun silver that new), and new enough not to have oodles of signals to interpret. Once you've gotten some silver and wheaties from these type yards, the sounds and tones will make more sense, on "what is a deep coin sound", when you go to other areas (junkier spots, hunted out spots, etc...)
Another trick to upping your oldie count when turf hunting, is to resist the temptation to dig shallow stuff. Pass all clad. Like .... anything less than 5 or 6". The reason for this is, when you're digging the clad, your ears become subconsciously tuned to look for the loud "bongs". But if you only dig the deeper signal, guess what your ears will become subconsciously tuned to?
There are those who think this tip is silly. In their logic "why not have it all? Why pass clad, when you can just dig all, and thus not miss something potentially good yet-shallow?" But by the end of the day, I can gaurantee you that this person will have 40 to 50 clad, and perhaps 2 wheaties. But the guy who passes clad, and only digs deeper signals will have 7 to 10 oldies and only a few clad. I'd rather have a single silver dime, than 100 news ones.
Oh, and this whole depth thing only applies to turf, where depth and age tend to be correlated. If you find that you simply can't get the depth, in your area, for silver, in any turf anywhere, you may want to broaden your search areas to things more exotic: like old-town urban demo's, ruins out in the desert and mountains (old stage stops long gone, old campgrounds, etc...) where depth and age aren't as correlated.