Machine Sewing tutorial;
Step one get a machine.
Step two read the instructions. Maybe buy a few books or watch a few youtube videos.
Step three practice.
Step four practice some more.
It's really that easy. The hardest part is getting the tension right so the loops are hidden in the fabric. Once you start that will make sense.
Actually the hardest part is making something without a pattern. When I made the canvas cover for my sons generator I started out with an old sheet, figured out what each piece should look like then allowed 1/2 inch for the seams. I cut it out and sewed it up. It looked like crap, but I knew just where to adjust things to make it work.
When I made the weather covers for the FJ40 seats I was using an old Harbor freight poly tarp. The first one looked like crap the second one wasn't half bad.
This is the first one, just a simple cover to keep the seats dry and the sun from destroying the fabric.
This is the second one still no work of art but it gets the job done.