Try finding a phone booth Vince! lol not a bad idea though. Gary you might be good at zone focusing, I can't guesstimate distance worth a nickel! (well I can if it involves an inch or a yard since I do needlework).
I agree with Leonore, do some watching. It doesn't have to be people, it could be birds, etc., I was shadow watching the other day, a pattern on a brick wall, and watched and waited as it moved til the 'lightbulb' goes on that tells you, that's it! - that's a moment to capture.
I've done sports, mostly hockey, and that involves some watching and waiting, getting set, waiting til they skate into my viewfinder then adjusting framing and focus and watching for something interesting to happen.
I think out and about with people if they ask not to have their picture taken it's better to respect that and move on, seems understandable that people have concerns about where their picture might end up or how it will be used. You could look at
American Society of Media Photographers they have a 'pocket' release and an app depending on how you think you may want to use the photo someday.