Sewing leather often requires that the needle be pulled or pushed with needle nose pliers. It's a good idea to lock the thread so it doesn't keep coming off. Here is a quick tutorial on thread locking. Lots of wax is helpful to keep the thread from fraying and breaking. Using a needle at each end of the thread speeds things up, and when the thread gets short, stitch ahead with one needle three or four holes and come back to lock the stitch. No need for knots. Here are some primitive diagrams of how the lining is attached.
Like the shako, the lining is dyed black, but doesn't get a coat of gloss varnish.
With all the sewing done it's time for dye and varnish.