I just started playing a little while ago, and left the city i started in. Are there any other cities to go to, or will i somehow have to find my way back to where I started?

I guess it was kinda stupid to leave the city, but im new to this type of game, and couldnt tell the npcs apart from the other players, and didnt want to disturb any role playing with stupid noob questions, lol... so i figured id go out and kill something...

Currently i am in a huge castle above a waterfall, i havent seen any other players in a while, my attacks dont hurt the monsters at all, and i somehow dodged every attack from monsters, except when a group of crablike creatures ganged up on me...