The best way to obtain this achievement is to complete the tutorial for the game.
There are 6 sections to the tutorial each dealing with a different aspect of the game. The first 5 teach you how to play the game and the 6th one is a single player duel against the AI using 1 of 6 starter decks that you choose. You will be receiving gold and xp after each of these sections and after the 6th lesson you will have earned enough xp to reach level 2 and you will also unlock the "Take the Boot" achievement.