-Go to Ellinia and purchase some potions, then find and fight some slimes and snails (tree stump is not that effective). Fight until your life, mana, and potions run out. You should have enough money to buy more potions. Do so, restore yourself, and fight again.
-While levels 1 to 5, stay at the Maple camp. From levels 5 to-8, train on Snails and do missions. From 8 to 14 fight red Snails, Stumps and Slimes. From levels 14 to 20 fight Pigs, Ribbon Pigs, Orange Mushrooms, and Green Mushrooms. For faster levels, simply focus on Green Mushrooms. From levels 20 to 30 fight in Ant Tunnels 1 and 2 or do party quests in Kerning. For faster levels just focus on Ant Tunnels.