Newbie Guide:
Several of the villagers here could use your help. Talk to them and click on Quest to see what missions they have to offer.
They will not ask you to perform a quest which is beyond your abilities, so if they refuse to offer a task, it means that your level is too low to provide a reasonable chance of success.
You should also know that there are quests that you may only perform once, but there are also repeating quests that you may complete seveal times.