Starting my adventure on World of Warcraft?

Just follow the tutorial, its very helpful for a first time player; as far as questing goes, Blizzard recently added a a questhelper thing that shows where you need to go (or you could get the addon called Questhelper, go to curse.com to get it), just open your questlog and "track" your active quests (or whichever ones you want to get done) and on your map it should show you the areas you need to go to and when you hover your mouse over a type of monster it should say in the tooltip you need to kill it for a quest. If you're on a trial account theres a lot of restrictions, so you might not be able to build a friends list, in wow its not like you have to add him first or he has to add you first, when you put someone on your list it just adds them, whether they add you or not. Pro tip: roll horde