Instructions
Consider a fighter when you choose a class in Dungeons and Dragons for the first time. Fighters are generally well-rounded characters without too many crippling limitations. Plus, they get you into the middle of the action, and they don't have a lot of extra rules to remember. This is important because you will have a very large number of general rules to figure out, so choosing a simple class can make the process much easier and get you playing faster.
Consider a mage when you choose a class in Dungeons and Dragons if you have always fantasized about being a wizard. Magic users are often physically weak and unskilled with weapons, so they may be very vulnerable at low levels before they gain powerful spells. However, they more than make up for these deficiencies at higher levels, often becoming the most powerful member of a party.
Consider playing a cleric if you would like to be have the power to heal, which is one of the major functions of clerics in Dungeons and Dragons parties. Clerics are similar to mages, except that they gain their supernatural power through devotion to a deity of your choice. In the DnD universe there are good and evil gods and thus good and evil clerics. Good clerics generally focus on healing and defensive spells, while evil clerics may participate in battles using harmful spells.
Consider a rogue when you choose a class in Dungeons and Dragons if you like mischievous and clever characters. Rogues include thieves, assassins and various types of jack-of-all-trades. They may not be as strong as fighters or as smart as mages, but they generally have a diverse set of abilities and some special skills like picking locks and sneaky attacks.
Ask your dungeon master or consult your rule book about other more complicated classes. Depending on your system and your character, you may have the opportunity to combine more than one class or to choose a more highly specialized class, such as a paladin or ranger.