In Bobcat's defense, 20 miles is nothing in Calif....or anywhere else in the US.
My experience with dating sites runs the full gamut, from awesome to downright scary.
But I didn't actually ever meet Downright Scary in person. She haunted me online for years after I told her to stop contacting me....I found out she was married. So, not counting her, I'll change that to from awesome to a total waste of time.
My only advice is, avoid new immigrants. The reason is obvious, I'm sure.
Other than that, a) heed your inner voice, and, b) have fun. I mostly had good times.
Oh, also, c) now and then, go ahead and accept invitations to places or events you've never had much interest in but never actually tried before. For one thing, sharing it with someone who knows more about it, you might find a new interest, and for another, if it's something he's really into, there's an excellent chance you'll see him with his guard down, pretenses gone, being his true self.