It is easier to mark your quilt lines on your quilt (I like Crayola Ultra Clean markers or crayons) and start with a larger design. Leah Day recommends a 2" design for beginners. Probably 1" would be fine, too. The important thing is to pick a very simple design to start with and work from there. Too many of us pick fancy FMQ designs & then are frustrated when we can't do them as our first design. Reality sets in pretty quickly with FMQ.
That said, yes, there are plenty of beautiful quilts with only straight line quilting.