After you learn how to make a slip knot, you will need to know how to cast-on. It takes a little bit of practice, but once you get the hang of it, you will be able to do it with your eyes closed.
When you make your slip knot, be sure to leave a tail end that is at least three times the width of the item you want to knit. For example, if you are knitting a scarf that is six-inches wide, you’ll want to have a tail that is at least eighteen-inches long.
Got your slip knot ready? Let’s cast-on.

Hold the needle with the slip knot with your right hand. With the left hand, close the bottom three fingers around the yarn, then spread the yarn open with your thumb and index finger (Figure A).

Pull the right hand side down. It will look like you’re holding a slingshot (Figure B).

Here’s the part that will take a bit of practice. Take the needle with your right hand and pick up the left loop closest to you from bottom up (Figure C).

