First notebook entry: Introducing myself

My name is Manami.
I've ever went to Hawaii and Singapore when I was in elementary school. When I was in Hawaii, a man asked me "Where are you from?" then I said just "Japan," so the conversation was finished. At the time I thought, "If I could speak English, I would talk a lot with him."

Because of that experience, I decided study English. Also, I want to work the service industry and use English. :)

If I had enough money, I would go to Singapore again. I went to there before, when I was too young, so I can't remember it clearly.

Thank you. :)

First notebook entry: Introducing myself

My name is Manami.
I've only ever been to Hawaii and Singapore when I was in Elementary school.
As I  When I was in went to Hawaii, a man asked me "Where are you from?" then I said just "Japan."
(Just like that)So the conversation was finished. At that  the time I thought "If I could speak English I would talk a lot with him."
Since those that experience I decided study English.
Also, I want to work the survice (service) industry use of Enlish (English  :) ) .:)

And if I could have  (get, acquire, earn) enough money I would go to Singapore again.
Because when I went to there before,  I was (still) too young, so I can't remember (the experience) clearly.

Thank you.:)

Really good job. The errors were little and any native speaker can understand what you mean. 
Excellent choice of words. Choice of words is one of the hardest thing to learn in English so very impressed :)