There is nothing to fear. It is motor coordination like learning to ride a bike or driving a car.
1st Find a speed that is comfortable and observe the feed dogs moving the quilt.
2nd Be able to get to that speed again + move the quilt at the same rate that the machine did.
3rd Look ahead to where you want to go not at the needle.
Start with something small: make a dog quilt for your local animal shelter. Most dogs are not picky at what they lay on. It takes some practice. Try drawing lines and follow them. I found that easier to do than stippling. You can also do straight line quilting until you get the confidence to try FMQ. Good Luck.