How do I get my first mount as a blood elf horde?

How do I get my first mount as a horde? I'm a level 50 mage and I'm actually new to the game and I don't know where to buy my first mount with riding at 30.
I know I can buy a mount in silvermoon for 10 gold but I need riding at 75 which is very expensive for me.

You need to sell some stuff. Pick up everything from monsters, sell gray items to vendor, post cloth/green items in AH. Pick up a gathering profession, sell herbs/ores/skins.