Just be aware, that if someone had a really good site they'd found, that was giving up nice old coins, .... then odds are .... they're not going to come on to a public thread like this saying "go here".
This is the bugaboo that bedevils persons just starting in this hobby, is they're sort of "cursed" to hunt new clad, and are condemmed to wander out to the same old obvious spots (that are no secret to local history books). Yet the old-timers .... of course .... had the SAME history books 10, 20, and 30 yrs. ago. So pity the poor new guy, who goes to the same spots, and all the 4-star easy signals are long-since farmed out. Naturally there's always new areas to research, there's always places the old-timers didn't go, there's always better/deeper detectors coming out, and there's always private property yards and such that are still virgin. But odds are, if a place is brimming with easy oldies, then no, it's not going to be given as an answer on a public forum such as this. Human nature, will of course, mean those persons will hunt that spot, till the point that it's no longer easy pickens, at least.
The only way to break the vicious cycle, I've found, and to get those old-timers to drop their guard as to where they're finding the old coins, is to have sites of your own research, to cross-share with them. You know, tit-for-tat. For example, I used to take any and all to my hard-earned hard-researched sites, since I enjoy hunting, and love company. But after awhile, I became exclusive, because I found that a lot of these guys simply wait around me for to research sites to take them too, while they never lift a finger. Or they find something old, but still loose interest, and I never hear from them again, etc... So I began to be tight-lipped, and only hunt with like-minded old-pro's. As you can see, that's a recipe for the poor newbie to "never break in" to that

But the way to break in, find old sites, learn what's been been hunted, etc... in your locale, is to find sites that you, in turn, can turn old-pro's on to. The ONLY time I invite others to hunt my sites, is when I feel that they too can "bring to the table" equal spots, to ... in turn ... invite me to.
For example: when I first started, there was a fellow in a town about an hour from me, that had by all accounts (rumors that circulate through the rumor mill) lots of seateds, reales, etc... from his years of hunting. But whenever I'd run into this fellow, and ask "where can I find old coins?", he wouldn't give me the time of day. Thus I considered him snobbish, elite, rude, or whatever. It wasn't till I researched my own sites (that gave up a gold coin and seateds), and THEN bumped into him one day, and said "hey, got this $20 gold and some seateds at this stage top last week". THEN he started to open up, get chummy, etc... And THEN he started revealing his spots. And THEN we started hunting together. You see the trick? Otherwise those that work hard get the feeling they're just making a circus, baby-sitting, etc...
Yeah, I know, it's a catch-22 vicious loop, because .... how are you supposed to "know where to go to sites", unless someone tells your first? So all I can say is, research research, research in the dark dusty archives of your local historical society, library, etc... Volunteer to be a docent. Rub shoulders with history experts.