I have a couple of very basic apps that have been published to the App Store. One is basically an informational app for my workplace that consists of a series of views with buttons, weblinks, transitions, etc. The other is a couple of views that will play random sounds when pressed (no, it's not a fart app

). However, my workplace now desires an upgrade to the current app that will allow the same basic info in 14 different languages (among other changes), and since I am the only one that has worked with this I am the guy that has to get it done...
Therefore, I feel I have reached a point where I need to get some formal training on developing for the iPhone, and I am interested in Big Nerd Ranch (or others if anyone has any recommendations). However, I have some questions for anyone that may be familiar with them...
1. Does BNR provide a good training experience?
2. Would you recommend going straight to the Beginning iPhone course, or would it be wise to start with Beginning Cocoa?
3. Are their classes suited for someone with a very limited knowledge/experience with object oriented programming?
I appreciate any help with this. I really want to do this, but I don't want to spend $5000 to spend a week banging my head against the wall and then walking away with nothing but frustration.
Thanks!