Almost everything you will ever sew can be done with from 5 to 12 stitches per inch.
To release the thread at the end of a stitch line, rotate the hand wheel toward you as you lift the foot and pull the work away to the left. You need to get the needle up to the top of it's highest point.
When you start sewing, either hold both pieces of thread, or pull the hand wheel forward until the needle goes into the work.
No one lives forever, the trick is creating something that will.