Things You'll Need
Instructions
Craft a history for your half-orc that explains how she came to be and what sort of person she is. A half-orc raised among a brutal tribe of orc barbarians will have a very different world view than one who joined a religious order in a large human city as a child.
Come up with a name for your character. A half-orc who takes on a guttural name will receive a different reaction when introducing himself than one who adopts the naming conventions of human or elven lands.
Work hard to gain acceptance among the other races if you playing a good or neutral aligned half-orc. Commit good deeds whenever possible, strive to understand the cultures of other races, and attempt to become well known enough to rub shoulders with the people in high places.
Act in a completely savage and feral manner, taking what you want by force and killing any who get in your way, if you are playing an evil half-orc. Don't bother with following social protocols or attempting to get people to like you, as you will probably end up having to kill them later to take their stuff anyway.
Decide if your half-orc will be a brooding character who is constantly depressed about his lot in life or a more optimistic character who tries to see the silver lining in every situation.
Feel free to pick any class for your half-orc, as they are just as likely to be any of the standard classes as a human. As long as your character's statistics are high enough, there is no reason he couldn't be a wizard or cleric.
Remember to properly role-play your character's attributes. If you choose to have a low intelligence score in order to have higher strength, have a hard time comprehending complex tasks and use a lower form of speech.