Your character can be anything you can imagine from a fantasy setting, or at least, he or she will have the potential to become those things. From lowly peasants to creatures of immense power, the world is open, if you are clever and persistent enough.
We understand that most new players do not have the resources to create a fully-realized costume immediately. Most veteran players have spent years developing their costumes. That said, creating a costume that avoids out-of-place items is not too difficult. There are tons of resources describing how to make simple t-tunics, even using old t-shirts. Find some plain, dark-colored pants (avoid jeans), and some simple natural-looking shoes, and you are ready to play.