Either experiment or go by a build guide
Tips and tricks for beginners for Path of Exile: The Fall of Oriath
For some new players, it will be more beneficial to go straight into the game and experiment. While you may find yourself creating new characters if one doesn’t work out, over time you will get the personal satisfaction from learning Path of Exile’s mechanics. This way you can experiment with different ways to play the game through different weapons and skill gems.
For others, all of this may be too daunting, and you may learn better from following someone else’s build while you enjoy the game for the first time. Fortunately, the Path of Exile forums has areas for each class where veteran player post detailed build guides. Usually, they include the skill tree at different increments and are based on a style of play or a specific gem. They are often made with end game content in mind, so during the main acts you won’t usually have issues with progressing through the game.
