Welcome from a fellow Brit to the GT community. ;)
The best place to begin mastering basic chord groups would be Guitar Fundamentals 1.
Chapter 5, I believe, covers the F chord specifically.
Johnny Cash is definitely old-skool! Jerry Lee Lewis and Great Balls of Fire is one of my favourites from that era! Great taste in music.
Good luck and welcome aboard!! :)
Am I the only one who plays multiple instruments? Let's be inspirational and find our muses everyday!