We are all smiling because what you have shown us is exactly what we have experienced when we first started quilting. Not to worry, you will make it work with practice of seating those seams. But the way I get around this problem is strip sewing two pieces of fabric (say 2-1/2 inches), press out and then cut that into 2-1/2 inch pieces. Turn one opposite the other and whambo-o-o-o, a perfect four patch. It all weighs on that *&#@$@ quarter inch seam. You will get there soon. Do not give up.