amazing pattern drafting site for stretch fabrics, etc; not sewing 101 but great info all over the place. This piece in particular is a WOW, wet-suit engineering taken to the next level by reducing pockets of air and making more close fitting
Tips for sewing with knits. Use either stretch or ball point needles when sewing with knits. Stretch thread is an option. A walking foot keeps the fabric from stretching while you sew. Use a zigzag or stretch stitch.