Were do you get a fishing pole, and how does it work?

You must be lvl 10+ to get into the fishing area I think but start out in sentosa south gate and follow the signs. The fastest way to get there is the exit that is just over the bridge and one map to the right. There is an npc that sells the fishing pole and bait, simply purchase both and equip the fishing pole in the weapon slot. Go out onto one of the fishing docks and press the attack button and you are fishing. Good Luck.

Thanks for helping him, but next time verb please check the Faq and ask there.