Hi Dan,
I am quite new to this thing as you are and I found that everything starts if you decide to help out the big guys. And please do not start with doubts for that will only hinder your way to landing a successful JV. It is like saying 'Why should I try when I will fail anyway?' How will you know if you did not try right?
Also, do not go head on and ask for a JV. Offer to help first and it will do wonders. You will even be surprised how quick these people will receive you. Give before asking.
Hope that helps,
Aira