Outline quilting is just quilting around the shape that is there, either in the ditch or a quarter inch away.
Echo quilting is repeating that shape at quarter inch intervals like the ripple when you throw a stone in a still pond. It is not necessary that it is exactly at quarter inch, but I use my quarter inch foot and echo quilt a lot. It is especially easy on straight lines. Keep echoing until you run out of space.
I agree with the above suggestions to outline quilt and then use lots of different techniques to practice many shapes and HAVE FUN!