The biggest thing that I have found is when you finish the Gloomingdeep, [aka Tutorial], you are usually Lvl 10. If you set out on the Quests from V'Lynn or Castlen right off, then you may find yourself behind the 8 ball. I have gone on quests that seemed simple enough and then out of the blue, a red NPO kills me in a single swipe.
It is not too difficult to break your bones in the Field of bones and Level up to high 12 low 13 and then begin the quests from V'Lynn, you get better results and still get Armor you can use. Just avoid the Iksars in the field of Bones, or you loose faction that could hurt you down the road.
To give you a time reference, I began playing about a month ago. One more word on this. You will get an email when you Level. DON'T Try them!. The NPO's you need to kill are usuall Red or Yellow and can result in a long corpse run. The emails are not Level comprable, maybe 2 or 3 off.
Happy hunting...