I'm a newbie too and still challenged by matching up seams and intersections. First thing that helped me (after learning about cutting and sewing accuracy) was to press properly so that the seam allowances go in opposite directions and you can feel the seams nest up together. Second thing is the forked pins (mine are from Clover). They are very fine and sharp and you put a prong on each side of the seam to hold it exactly in place until you sew up to it. I never sew over the pins. I'm working today on assembling a small quilt from bowtie blocks and boy, are there a lot of intersections! Third thing I've learned is practice, practice, practice.