There are some nice tutorials on the web. I just spent a few hours there last night. Practice - practice - practice. I'm in the same spot you are and so far my attempts have all looked like crap. A big jerky mess. I've been looking for a class but none of the LQSes around here are offering machine quilting as a stand-alone class. Maybe I'll talk to the store and see if I can get a personal lesson just to get me going coz on my own - I SUCK!
Good luck.