I'm sure I break just about every rule of quilting since I'm largely self taught but read on anyway.
You need a plan to get started! Here's my first plan which doesn't use half squares and my second which does. Do these in pencil to prevent insanity!
Here's my stash of precut denim for the quilt.
Sew your quilt together two pieces at a time. I measure down 1/2 inch and draw a line in red. I attempt to straight stitch on this line but often miss as you can see. I do this twice and them zig zag stitch the seam once to prevent fraying.
Here's what the two sewn together squares look like from the right side of the project.
Here I've pinned on another two sewn together squares.
When I do the second straight stitch, I just flip the project around. To keep things from getting too bunchy I roll the fabric up like this.
Here's what things look like as the roll of fabric gets larger.
And here's the fabric turned around for the second straight stitch seam.
Finally, here's a peek at the progress.