Shadowing an NP

hello NP's! I will have a wonderful opportunity to shadow an NP and I was wondering if anybody can tell me what I should expect? Will I actually be there when the NP is interacting with patients? What about confidentiality issues and just the weirdness of having someone else there? Should I ask a lot of questions or just quietly observe? I don't want to "get in the way" or anything like that so any insight would be wonderful!

Also a quick question, are multiple certifications possible? Let's say I want to be a pediatric NP, but then later on want to switch and go into family NP, would I just go back to school and then be both a PNP AND FNP? It's kinda of a weird question but I was just wondering. I'm sure it's difficult to keep two certifications? Plus going to school twice.