Puppies are just too sniffable. :)
Do try it. It's really best if he learns to potty outside from the beginning. Teaching him to use a puppy pad or paper inside, and then trying to train outside, is very confusing. You'll end up prolonging the process, and with a stubborn breed like a JR, it's really not something I'd recommend.
Any questions you have, ask them. My main area of expertise is obedience, but there are many dog experts on this site and there's always someone available to answer any question you have, from possible illness, to food, to allergies.
You're starting an exciting journey. Puppies can be a pain in the butt, but boy are they worth every chewed up shoe, and every pile of... well, you get the idea. :)