I am a level 20 mage blood elf and i dont know where to find my firs mount can anyone help me plz???

Go out the front gate of Silvermoon City, cross the aqueduct, and turn left at the road in front of you. A short distance (about a minute of constant running) down this road is a large gazebo with large ostrich-like birds standing outside of it. The riding trainer and mount vendor are either inside the gazebo or somewhere just outside of it. If you get lost, just find a guard wandering outside of the city and ask for directions. - LJS