This is a really simple one, you are able to enter the deck manager before you've even played your first game even though there's not really much you can manage then. Just scroll over to the "Deck Manager" option on the main menu and select it. From there it will let you choose what deck you would like to manage. Once you have selected what deck to manage it will bring you to a screen where you can look at what cards are in the deck and the achievement will pop upon arriving there.