Now that you've made your continuous binding, you can take the seam over to your ironing board and press it open. That way, there's a little less bow in the binding. Then press it in half lengthwise. You're going to have this nice long piece and you're going to match the raw edges of the binding to the raw edges of your quilt. You're going to leave about six inches or so and start sewing somewhere about midway down a side. Here, I would try again for a quarter-inch seam allowance. This is a good time, again, to use your walking foot. It really pushes the fabric along so you don't have to worry about ripples and puckers once again.
You sew until, what I do is when I'm a quarter inch, I like to mark this. Put a mark a quarter inch from the edge of the quilt. The mark goes on the binding, but you're measuring the quit. Then you keep sewing until you get to that point. Once you do, I usually sew a backstitch, two stitches. Take this out from the pressure foot.
Here's where you're going to make your mitered corner. You're going to see you've got your quarter inch unsewn. You're going to take your binding and bring it up at a 90-degree angle. Then you're going to fold it back down in the direction you're going. Then you're going to take that and put that under sewing machine foot and continue until you get to the next corner. And then, you'll do the same thing.
After you've sewn the binding all around the entire quilt and mitered your four edges, this is what it's going to look like. You're ready to sew it to the back.
Taking your time to learn how to make binding is a very good idea. It really gives a nice, finished professional look to your quilting. It's worth taking the time to learn how to do it well.