ragnarok online zeny can help you become a mage simply. Of course, you should have some better equipments which you spend ragnarok zeny buying.
To actually become a mage, you need to get to Geffen and walk into the Mage's guild. If you saved Morroc, Prontera, or Payon which might make this part a lot easier. So you had better have enough ro zeny. You need to talk to the person in the back of the room to become a mage and she will give you a quest. You can talk to the bookshelf at the north end of the room and learn all the requirements.
Often there are merchants in the room selling the necessary solutions. If not, you walk in for a long time. I would recommend walking into Geffen with 6 Jalopy, 3 fluff, and a milk in the first place, ideally with your save point being in Payon or Prontera. You also can use iro zeny to shorten your walk time.
When you enter Morroc to get the Morroc solution, you must go to the North-West corner of Morroc and through the warp. Now you walk to the center of this map and should find an NPC named some variation on Pocahontas. She will give you the Morroc solution.
When you enter Payon to get the Payon solution, then go to the archer village, the north east exit out of Payon. Once in archer village, head for the eastern path. The NPC should be on the side of the path a bit farther than halfway up. There are two small lakes in Payon, the NPC is just to the north of the southern lake.
I tell you the solution of Morroc and Payon can help you save many cheap zeny. So I hope you can share me your experience.