What's the best way to get AD at a low level like 20?

You don't, basically.

You're basically asking how to do end game stuff at level 20. The answer is you don't.

Then how do i get to 60 the fastest possible?

before it was kill 50-100 ogres over over for 4-5 hours
after it was pressing F and 1 for 40 minutes
now its killing monsters and handing in quests and pvping for hours and hours and hours and hours and hours and hours and hours and hours and hours and hours and hours and hours and hours and hours and hours and hours.

nty. can't be bothered. next game. >.<

Ask your mom or dad for their credit card ^.^

Obviously he's too busy for that, just take it.