I found a LQS that provided lessons on the long arm machine. I practiced on a few quilts and then started doing my own on their machine. They rent the long arm out for $10/hr plus thread if you use theirs. You may try locating a LQS that provides this service and do it yourself. There are a lot of resources online that provide designs. I also practice on my own machine so that it helps me to create designs easily on the long arm.
Hope that helps.
Diana