Thanks for the encouragement and suggestions! I think I'm getting hang of it...was a bit of dry spell due to cold/rainy weather last couple days, but today is nice and we all ready got some practice on a lady working out on her yard and a guy mowing the lawn. Overall, I think he's doing well...he's def not obsessing once he gets his treat and I haven't heard a snort since we started doing this [sure I just jinxed myself]. He'll look back at them here and there, and if it seems like he's fixating...I just treat and he refocuses on me.
The petting thing is difficult right now...I didn't even think about it, but people really aren't even asking if it's ok [they usually do with my adult dogs]. They are allowing him to come to them and sniff first, but after they automatically reach for top of head. I just need to learn to be more vocal and instruct them as suggested.
I think I found an obedience class, so hopefully that will help too. Thanks again all!