What the other posters aren't telling you is that archers are only as good as their gear is.
When it comes to starting your first character, the easiest would be a thief, and second-easiest might be a mage, like was mentioned by someone else. Mages are not solo characters and rely a lot on other classes that can take damage for them and buff them, which is why thief is the easier of the two. (There are mages that can solo, but they have very expensive equipment.)
As a thief, you are able to use elemental daggers that are available from a NPC as soon as you are able to afford them (level requirement of 1 to equip, I believe), and they will last you for a long time. Ultimately, they will be replaced by blacksmith forged weapons once you become more wealthy. Flee-increasing equipment is relatively easier to come by compared to other kinds of equipment. These are the reasons why I would suggest going thief first. Not only that, but even after you decide to make your "main" character, you'll still find your thief useful for item farming using their Steal skill.