i want go aboard one day. -> I want to go abroad one day.

i want to be an useful people and let my family are prond of me. -> I want to be a useful person and make my family proud of me.

I don't think the people above me are necessarily wrong. I just made it sound like something an average American person would say. Something that would sound very native to us. =)

First notebook entry: Introducing myself

i want go aboard one day.i want to be an useful people and let my family are prond of me.

This should be written this way:

I want to go abroad one day to be a useful individual* because I want my family to be proud of me.

note*(individual is used instead of people- because your are just pertaining to your self)

First notebook entry: Introducing myself

I want to go abroad one day. I want to be a useful person and make my family be proud of me.

Note: I can see that learning English is very important for you. Let me help you.