Ok, here's the method:
So you start out by running out of the city. Kill 4 green worms/spiders (depends on race). Congratulations, you are lvl 2 and can wear armor.
Run a little futher until you see "deer", kill 10 of those. Congratulations, you are lvl 3.
Continue along the road and kill around 15-20 lvl 5 boars. Congratulations, you are lvl 4. Keep on killing those mobs. Congratulations, you are lvl 5 and can learn class skills.
Etc etc until lvl 100.
"I want to own a plane, said Billy the village idiot"
"But Billy, you can't fly a plane. You need training for that..", replied the sensible villagers.
"FUCK EFFORT, I WANT TO FLY NOW", Billy shrieked in a high pitch voice because he had small testicles.
It was at that point that the villagers brutally axe murdered Billy.