Everyone has their own skills and will learn at their own rate. Some quicker than others. It really depends on your drawing skills and your mental memory. When I was learning, I always worked on practice pieces(which some of them turned out pretty cute). I would practice writing names in cursive, doing clouds, swirls, and whatever else I could think of. It's just practice. When we got our machine, they told us it usually takes about 100 hours on the machine for people to become comfortable and know what they are doing. There is alot you have to know about them. It's alot of learning, but it is so worth it in the end. I'm a visual learner, so I watched lots of videos. Some were bought and some were on youtube. I like the pajama quilter. She is lots of fun to watch and she is very helpful. You can also practice on a dry erase board. Drawing it out will help build up your mental memory.
I wish you the best of luck, and there are lots of people here willing to help you if you need it.