I suggest killing the Fire Mushrooms first because you might level up
Start location: Roumen - Level required: 4. Talk to Item Merchant Pey to start the Cabal Alz quest. You'll have to kill 20 Fire Mushrooms and 1 Mushroom Fighter
Tip: When you're low level make sure you have some food with you.
Note: On your way to the Fire Mushrooms you might see some Mushroom Fighters, but these are stronger than Fire Mushrooms so I suggest killing the Fire Mushrooms first because you might level up.
Go to the Forest of Tides and go to the Fire Mushrooms (7, D), kill 20 Fire Mushrooms, then go back and kill a Mushroom Fighter on your way. Go back to Roumen Field and talk to Item Merchant Pey to finish the quest.
Reward: 9 exp, 13 coins and 2 fame. Selective Reward: Leather Pants, Litany Pants, Trivial Pants or Novice Pants
Start location: Roumen - Level required: 1. Talk to Element Helper Remi and click "Begin the Tutorial Quest" to start the quest. She'll give you some information on keyboards shortcuts tell her that you understand it.
Now you must go to Healer Julia, she's just up the stairs behind you. Talk to her about the quest and complete the quest.