Here is one technique that I noted:
Paper-piecing tip: cut fabric pieces to the right size every time
from
Quilt Block Bonanza by Nancy Mahoney
When making a paper-pieced block, I always make an extra photocopy of the block. Next, using a rotary cutter, I cut out the pattern pieces from the extra copy, on what would be the stitching line. Then I use the paper templates to
rough cut each piece from the wrong side of the fabric, making sure to include at least a ¼" seam allowance on all sides of each template. If this doesn't help, send me a pm. Good luck! You can do this.