start with small practice pieces -- a walking foot, feed dogs up for stitch in the ditch/straight line quilting
a round (hopper foot/sometimes called a darning foot/ or free motion foot) feed dogs down for free motion; curves, circles, stars, flowers...stencils,
practice, practice, practice.
as you become comfortable move up to larger & larger projects- before you know it you will be quilting queen sized quilts. if you have a local quilt shop check with them to see if they offer beginner quilting classes- a class will answer questions as you start, teach you to baste your sandwich in preparation of quilting- and give you a foundation to build on....but it is certainly possible to become a very good (domestic machine) quilter on your own