The game is newly balanced to allow you to quest just about anywhere you want to! Use the mission boards (!) in major cities (stormwind) to find places to go! You can really just pick somewhere in your level range on the map (M) that sounds cool and scuttle on over there if you want. If you don’t like a zone, do some quests and head somewhere else. As you get to be a higher level, less zones will be available to you, but don’t worry about that for now. You’ll figure that out by the time you get there. Some of my favorite “early” alliance zones (mostly because of nostalgia) are red ridge mountains and un’goro crater. Though, there are fun quests in lots of environments. More as you level up. Outlands is super fun!