Beginners can't straighten their bows, so it's better to have a bow straightener first. After the right hand basically holds the bow, there is no need to use the bow straightener. First practice the longbow with 1/2 or 3/4 bow, and then pull the whole bow with strong control of your right hand. Pay attention to the direction of wrist and arm movement when practicing, and you will pull slowly when practicing more.