Look for local open casting calls. Depending on the area you live in, there might be opportunities to be in films near you. Search online for open casting calls in your area. Look for both feature length films and short films. If you find an open casting call, go to the audition. Dress your best, prepare your audition material in advance, and give it your all. And most importantly, don't be discouraged by rejection. Taking rejection well is an essential skill for aspiring movie stars.