PvP is a whole lot better way to earn marks than farming precious materials that you need for upgrading guns and armor. Now maybe you like to stick to just one build and have acquired all the materials you need but you get 2 marks for a loss and 3 for a win. You can play some super quick games. You can go into the game with the mind set that you will have fun! Just go in there and have a ball man. It doesn't matter how good you are at Destiny in the PvP arena because, lean close and I'll tell you a secret, this has no bearing on your life. Just learn to have fun with it!