Objective: Chain several previously-learned techniques into one smooth build order so a saleable lined zippered pouch comes together quickly and consistently.
Making money from sewing depends less on any single skill and more on sequencing skills so you rarely re-thread, re-set, or re-press out of order. The MC6650 helps you here: its programmable memory and one-touch stitch selection let you save settings between operations, and the automatic thread cutter and knee-lift free your hands at pivot points. The professional habit is 'batch by setting': do every step that uses the same foot and stitch before you change anything. A lined pouch needs three distinct setups — a zipper foot for installing the zip, the standard foot with a straight stitch for assembly seams, and a short reinforcing stitch or bartack at stress points. Plan the order so each setting change happens once: install the zipper first (zipper foot), then stitch outer and lining bags (standard foot, 2.4mm straight stitch, 1/4" seam), then reinforce the zipper ends and turning gap (shorten stitch to 1.8mm). Press between every major step, because pressing is what makes combined seams look manufactured rather than homemade. Use the needle-down setting so pivots at corners stay crisp, and the free-arm when topstitching narrow tubes.
Example: Build order for a 8x6" lined pouch: (1) Set zipper foot, select straight stitch, baste zipper to outer top edge right-sides-together, flip lining over and sew through all layers; repeat for second side; press zipper tape flat and topstitch close to the fold. (2) Change to standard foot, keep straight stitch at 2.4mm, open the zipper halfway, align outers right-sides-together and linings right-sides-together, sew around all four sides leaving a 3" turning gap in the lining bottom; set needle-down and pivot at each corner. (3) Shorten stitch to 1.8mm, backstitch over the zipper ends inside the seam allowance and edgestitch the turning gap closed after turning right-side-out. Three setting changes, each done once, with a press after steps 1 and 2.
Try it: On scrap fabric cut two outer and two lining rectangles 8x6" and grab one 7" zipper. Write out your personal build order as a numbered list before you sew, noting which foot and which stitch length each step uses. Then sew the pouch following your list, forcing yourself to change the foot or stitch setting only when your plan says to. Afterward, count how many times you actually re-set the machine and note any step you did out of order.