Basically, that's all you need to do. I would leave the top cut 1/4" wider all the way around. Then you can sew top blocks together (after quilting) being sure to butt backing at seam, then turn and hand stitch the backing together. One of the first quilts I did was a block to block log cabin pattern, and it worked out well. If you feel you need a template, just make one out of cardboard or that vinyl pattern maker stuff (lol). I can't remember the name of anything at the moment. Info overload.