Good eye contact
You should learn to make healthy and strong eye contact. The eye contact will make the director decide if you will be able to do the role or not. If you are struggling to maintain an eye contact with somebody, then they will figure out that you lack focus and concentration which is not suitable for your role.
Good voice and good body
You need to have an attractive voice and good body if you want to become an actor/actress or model. You can develop your voice by various vocal exercises, and you can improve your body by exercising. You need to work hard if you want to become an actor or a model.