This is the first class quest you will undertake as a hunter. It's purpose is to introduce you to your class trainer.
You must complete the quest  Cutting Teeth before you can access this one. Additionally, this quest is limited to orcs only.
Read the [Etched Parchment] and speak to Jen'shan in the Valley of Trials.
Ah, while you were gone a [parchment] came for you, <name>.
Read it when you have time. If I'm not mistaken, it came from the hunter trainer Jen'shan. She would have words with you when you're ready.
Jen'shan is located just outside the entrance to the Den, to the right.
Ah, so you come at last. Good. Jen'shan be waitin' for you.
Many tink it be an easy path, but Jen'shan tell you dat not true. Mastering da beasts of Durotar and beyond take as much skill as masterin' the arcane arts or speaking' to our ancestors.
Firin' a bow or rifle may not be as dangerous to you as castin' a spell, but it sure be as dangerous to your enemy.
When we finish speakin', you should talk to da rest of da citizens in da Valley. They ask you to do tings for them... tings that will test your skill and teach you some of da dangers of this land.
As you grow in experience and wisdom, you be needin' Jen'shan to show you better techniques and skills. Come back to Jen'shan often. I will let you know what I can teach you.
Here are the hunter starting quests for the other Horde races: