Remove the center front fold over that is used for an interfacing, leaving a 5/8" seam allowance (Sherpa will not take all that thickness for buttonholes).
Trace sleeve onto Kraft paper. Measure your full length of sleeve. Add the remainder measurements to the sleeve length.
Sew the collar, front and back seams and back sleeve seam with wrong sides together exposing the raw edges. Trim the seam allowance to 1/4".
Sew the under arm and sleeve under arm sleeve seam with right sides together like a normal a seam.
Steam do not press the fusible interfacing to center front, lower band and sleeve cuff.
Sew lining as normal seams and serge. Serging the lining seams keeps the bulk to a minimum.
Sew the collar to neckline. Connect the lining to the jacket, sewing the center front, collar then down the other center front.
Sew the lower band to jacket and sleeves per instructions.
If buttonholes are a problem for the sewing machine, sew a rectangle the size of button.
JOANN HACKS:
When pressing fusible interfacing, steam is better than heat. When steaming, if sherpa gets matted brush to pile up. Test a sample scrap first.
Use #14 sewing needle when sewing sherpa fabric.
Sew under arm seams of the jacket and sleeve underarm seam like a normal seam so that the sherpa will not fray with rubbing of the underarm and under arm seam.