Can someone help me write a fan letter?

I'm writing my first fan letter and I'm not sure if I'm doing it right. I want to send it to Miyazaki Hayao. This is what I wrote so far. I think I used watashi too often. (I wrote in English if I didn't know how to say it in Japanese. Can someone provide an accurate translation?)

２０１4年 7月 07日

宮崎さんへ

こんにちは。私の名前はジャズミンです。私はアメリカ人です。私は１８歳です。
私の日本語があまりうまくありません画許してください。
宮崎さんの映画は大好きです！The first movie I saw of yours was Spirited Away when I was little and it has always been my favorite.
私は 宮崎さんを感心する。
My dream is to meet you one day.
It makes me very happy to watch your movies. Your movies inspire me to find happiness and success in life.
Though you have retired, I hope you will live life to the fullest!!

ジャズミン

Also, does anyone know if I can still send mail to this address?

Hayao Miyazaki
Studio Ghibli Inc.
1-4-25 Kajinocho
Koganei-shi
184-0002 Tokyo
Japan

This address is right and I think he can read English.
Good luck!

Hayao Miyazaki
Studio Ghibli Inc.
1-4-25 Kajinocho
Koganei-shi
184-0002 Tokyo
Japan

http://www.ghibli.jp/30profile/000156.html#more

This is not strictly word for word though.

The first movie I saw of yours was Spirited Away when I was little and it has always been my favorite.
初めて観たあなたの作品は、小さい頃に見た Spirited Away です。それはずっと私のお気に入りです。
My dream is to meet you one day.
いつかあなたに会えたらいいなと思っています。
It makes me very happy to watch your movies.
あなたの映画を観るのと本当に幸せになれます。
Your movies inspire me to find happiness and success in life.
あなたの映画が人生に幸せと喜びを見つけるために私を導いてくれる。
Though you have retired, I hope you will live life to the fullest!!
あなたは引退しても、充実した日々を送ると期待しています！

By the way, today I read that he go to the office everyday after retirement, so your letter will reach him.
http://www.nikkansports.com/entertainment/news/f-et-tp1-20140707-13304...