Question

[Sin of light]

Were should a lvl 20 axe warrior train at?  

[Baconious]

I would either reccomend the dungeon or pig beach. Pigs you can take on a little more rapidly without having to use as much potions as going through the ant tunnel. Or you could try the place right outside sleepy woods, which is a little slow, but you get green and horny mushroooms.
Side note: Dont try to pq as a warrior till level 25, you wont be able to hit anything until then.