Hello, I'm Syrah the Guild Master and a miner in my free time...
Here are some mining tips:
Buy a mining pick
It's best to pick up the profession when you're not a hunter (otherwise you'll be tracking other stuff most of the time instead of looking for nodes)
It's a good money maker
Visit Elwynn forest every now and than... It's packed with Copper mines and they sell for 80S untill 1G a stack
Buy a mining bag (you don't have to take it with you all the time, but when you're doing a node run it can come in handy)