Once you enter the world of Eudemons Online, ...there is a starter quest giver right there where you spawn, he is up and to the right just a little, and his name is  Coach Grounce...talk to him.  He will give you a letter, read it, and you will be granted 200 exp...then warriors can go back to him at lvl 7, and mages can go back at lvl 6.

Then go outside of the city and kill the Mad Bulls...you will lvl up pretty fast.

If you are a warrior, summon your pets and use them.  At lvl 10 a warrior can Con with the pets.  Use your XP skill as often as you can.

If you are a mage, you cannot con with your mage pets, but if you are lucky and find a warrior pet you can.  Use your XP skill as often as you can.

Once you are lvl 15 you can go into the Training Grounds (TG), and you can get exp in there almost as fast as you can outside. Do not forget to use your XP skills in the TG too.

Always remember to group when you can with others, as when you do so, even if you are in TG, the exp gained from using XP skills while in a group with others is a huge help. 

Group XP usage is shared by all members of the team even when you are on a different map from your team members.

Go out an explore the Map close to the starting city...you will be amazed at what you might find.

After lvl 15 or so head over to Elven City and fight over there.

Always carry town scrolls on you.

Make friends, join a Legion, and most of all...Have fun while in the Eudemons World.