Two things for the run. First make sure you have great running shoes, big help. Second, watch some you tube videos on running form. For tri's the running style is kinda different after the bike. I say this because as a once in a while tri girl, I really struggle at the run. What a difference proper form makes.
I really wish we had something like that race here. We are really big down here for triathlon and you just gotta jump in with everybody. Have a blast and let us know how it goes.