The idea here is that you write what you think is best, and then ask for help in finishing it.
You need to:
-introduce yourself to the company or institution offering a bursary,
-tell them how much it would mean to you to receive it,
-explain why you think you deserve it,
-tell them how the money will be spent
-say something nice about the company/institution or person offering it
The above do not necessarily have to be in the order in which I have outlined them.
Good luck! Post here again and there will be help for you.
I am not a teacher.