Joe- Welcome to the forum and great decision to try and put down the analogs. You WILL get there. There are plenty of top-notch folks on these threads and we'll get you figured out soon.
I'm going to distill some of the info that's already been put up on your thread here:
1) Drink PLENTY of water. Vaping will dehydrate you a little bit and it also helps to keep your taste buds fresh for the next Vape.
2) Some folks have a PG sensitivity that can cause an irritation and/or drying of the upper respiratory tract (this is mostly where the water helps).
3) Adjust your ejuice PG/VG ratio as well as the type of juice you vape. Not all juices are created equal. I, myself, am very particular about what I will vape and I always error on the side of quality rather than anything else. I mean, we are effectively boiling some inert(ish) chemicals and then inhaling them. Surf the boards and you'll find out what most folks seem to like and feel safe with.
4) Your B&M store is there to sell you something and unfortunately they don't always have your best interest at heart. Be wary of them until you find one you trust. It may take a while. Or not....
5) Stick with it - AT YOUR OWN PACE. Most folks seem to get through an initial sensitivity and/or discomfort after a week or so and find that their "tolerance" improves. This is just your body adjusting to a new stimulus as well as you becoming more familiar with the technique.
This is your program and it's not a race.
If it takes you some time to figure out what is best for you and you have to smoke a few analogs until you find that perfect vape, so be it. Just don't give up on vaping and keep coming back to these forums for advice, stories, humor and news.
6) I haven't read anything about heartburn as a result of vaping, but I'm no medical DR. If it's persistent after a few weeks I would ask an actual professional... or more folks here on the boards.
7) Always ignore my spelling and grammar. It's atrocious and the spell checker changes all my mords abound (<- I did that one on purpose).
Welcome, my friend.
Nice choice on choosing better for yourself.
Stick with it.
I'll see you on the boards.