You can start off with killing a poring anywhere it spawns or just go through "Training Process" or warp into for_fild01 and kill a Fireing there [same as porings, just different name]. After that go @go 25 and change job.
Next step is pay_dun00/orcsdun01, level up your job level to 50 there, then go change job again and either go back to orcsdun01/02 or go pay_dun01/02, whatever you like the most. Try to reach base 99 there around, right now I really can't remember where else could you level faster.
After that there's a rebirth, which makes you repeat the same process written above just that when you reach lets say base 100, you can move to for_fild02 or try your luck with for_fild06 [depending on what class you're about to chose, Wizards, lets say are easier to level alone than priests. I highly recommend you create Wizard first, then leech your own characters with it].
When you're at 150 don't be afraid to go in for_fild6. Kill Uber Poring, Uber Poporings, Uber drops and you'll finish leveling in lets say 10~15 minutes, depending on what class ur using. Again, I recommend creating a Wizard first, then dual cielnt and leech all your other characters there [for_fild06] (:.
Also don't be afraid of using Yggdrasil berries [do @ali 607 i think or just type @ali yggdrasil berry so you'll loot them all along if you level in for_fild02], they're there with a reason to help you survive!
Hope it helped you atleast a bit.
And, welcome to the server (: