If this is your first rodeo in machine quilting, I would suggest straight line quilting with your walking foot rather than attempting FMQ for the first time on a Christmas gift. Here is a You Tube by Leah Day that can get you started.
https://www.bing.com/videos/search?q...BF17&FORM=VIRE
As far as starting and stopping you have a few options. One thing you always should do is bring your bobbin thread to the top and hold it when you get started. You can either leave long tails and knot and bury the threads just like hand quilting or you can take several teeny tiny stitches to lock things in place. Same for stopping. Bring your bobbin thread to the top and knot and bury by hand or finish your quilting line with several tiny stitches. Like all things quilting there are many techniques around to achieve the same end result. This is just one suggestion.