Depending on how quick you learn, that length board will be alright. There would be slightly easier options, but she'll probably do.
For a first board Jacks is OK, but they do have a bit of a rep for being not that great. Once you get a bit better you'll be wanting a smaller board anyway.
Head further out when you think you're ready, but practice your duckdives. Nothing worse than someone ditching a board 3 feet infront of you

With right of way, it is generally whoever is 'deeper' on the wave gets the wave. Don't stress too much. If you're obviously learning, everyone messes up and someone should tell you (hopefully nicely), the way to approach things.