It is going to look awesome! You have it on your design wall so do 1 row at a time to keep straight. It does look difficult but you can do it! When sewing triangles together, you have to have the little dog ears bypass each other by the same amount. I would pin my pieces and flip them open to check the placement and then sew them. This might be a time when the Elmer washable glue might assist in proper placement?