How to sew a Collar of a Light Overcoat

Fabric : Polyurethane (No information in detail) and it shrinks slightly after a certain period of time has passed after ironing. No lining. Overlock in all seam allowance. Back vent. Bal collar. Raglan sleeve. Single welt pocket with a flap. The white strip is just a PP strap that is often used for packing work. This is in order not to slide while sewing (sewing gap). When the thickness of the fabric is different, the pressure of the presser foot and the feed dog are not stable. Putting this tape mea