Sew your jacket pieces together, then sew the lining pieces together. Now its time to put the two together, you will place the lining to the jacket right sides together. Match edges and shoulder seams. Stitch along the front and along the lower edge. Stitch across lower back back edge. Stitch lower edge of sleeves. Trim and clip seam, I like to use my pinking scissors, they trim and clip at the same time. Remember your side seams are open at this time. Do not turn right side out.
Line up the lining pieces and the jacket pieces. On one side of the jacket pin the underarm sleeve seam to underarm sleeve lining seam, right sides together. Continue pining jacket sides and jacket lower edge seam. Make sure lining is matched to lining and jacket is matched to jacket. This is a circular seam, you will sew the lining and continue sewing the jacket.
Continue doing this on the other side but this time leave about three inches of the lining open, you will need to turn your work through that opening.
There you can see how both are sewn, trim and finish seams. Pull the jacket through the opening you left in the lining. Turn jacket with right sides out and push sleeve lining into sleeves. Press well.