There are tons of ways to cast on when you’re knitting. The E-Wrap Cast on is a very simple and versatile cast on.
How to work an E-Wrap Cast On:
Pick up yarn in left hand, keeping your left thumb free.
Bring thumb behind then underneath yarn and bring the right needle towards you to create a closed loop on your thumb. Put the right needle into the loop on thumb from underneath, taking your thumb out of the loop and gently tightening the loop onto the needle. Rep for the correct number of stitches.