Well tinkerbell668, your problem is confidence. You have to be confident about yourself, no matter what you do! You will show your dad that acting is a real job, and he will see. Your second problem is simular to mine, I belive that I can already act, and it came to me naturally, and you know what? That happens! You're just naturally talented! You just have to show that to the Casting Directors, but if you're good at acting, but you need to practice a little more, they can train you. Being experianced means that you actually went to an acting school, or you're in an agency, but if they like you and you look like the character their looking for, and know how to act, they will pick you.
Don't worry, just take a breath, calm down, and be confident, go to the auditions and try out! I belive in you! Hey, maybe we can meet eachother at the auditions!