BEGINNER (Bowman)

To advance to another class you need to train your character to level
10. Since where going to be an archer we also need 25 dex in your stat.
Put all you stat points to Str first so you can kill much faster with
melee weapon anyway you also need it in the future, just keep in mind
you need 25 dex when you reach level 10. You get 5 stat points every
level up.

As a Beginner you'll be transported to Maple Island. Talk to all the
NPC there if this is your first time, they will give you some "Quest"
and teach you the basics of the game like jumping and stuffs. Try doing
every quest available in that area so you will get free items and
equipments, most of them are straight forward so no need for
explanations.

Now you can stay here until level 10, killing snails (Green, Blue, and
Red) and some small mushroom (small orange). It is much faster to stay
here since there not much people here and the respawn of enemy is quite
good. Grab everything that the enemy drops after killing it.

Once you reach level 5, buy Razor knife in the shop at town. This will
make your training much faster.

Avoid the big orange mushroom if you don't have red potions they are
strong. Try not to use your meso for potion since if you die as a
Beginner no Experience Points is lost. Use your meso for equipments
then potions if you like faster leveling and have extra meso to spare.

There is also a quest there (check other guides) where you can get a
fruit knife, this is a level 8 knife, if you can get this then it is
much better. The hardest item you need to get in this quest is the
Orange Mushroom Cap from the big orange mushroom to get this try
finding some where there are in a ledge and jump slash them from the
other ledge until they die, if not then just keep slashing them anyway
if die there's no minus points.

If you decided to leave Maple Island before level 10 (recommendable
around level then kill Green Slimes and bring potions as well.

To leave Maple Island go the harbor and keep going right until you
reach the boat and pay Shanks 150 meso. You'll be transported to Lith
Harbor of Victoria Island.

Summary:

Target Level is level 10 with 25 Dex (requirement to be an archer)

Level 1-10 Snails (Green, Blue, Red), Small orange mushy
Level 8-10 Green Slime (outside Lith Harbor or go to Ellina and Exit
the top most portal (left) then 2 maps from there you'll find A LOT of
Green Slimes there).
http://www.gamefaqs.com/computer/doswin/file/924697/39297