More over is one word: moreover
Allowing students to access an international studying environment without leaving the country, RMIT has everything I ever dream of a college. I have firm belief that I have ability to pursue education at RMIT successfully.
Your whole first paragraph is all about why you like this school, and not about why you deserve the scholarship. The only thing you say about why you deserve the scholarship is, "I have a firm belief that I have the ability..."
That first paragraph needs to be rewritten to answer the prompt question. The way to cut down the word count is to take out some of the content about why you choose the school... and focus on answering the question.
Ahh, I see that you do very well in the next paragraph, though. I would like to see a new intro para that focuses on the question, and make it shorter. That way, the excellent second paragraph will be highlighted.
However, please do not mistake me for some nerd you see sticking to a desk in a library on a beautiful Sunday, having nothing to do aside from studying.
If you had to cut out that whole first paragraph in order to get within the maximum word count that would be okay!! The rest of the essay is great!!
I don't want to give a too detailed caption in the title because I'm afraid admission officer may find it on Google
There is nothing wrong with that! I hope they find it, because they will see that you care so much about improving your writing skill. Some kids think it is cheating to use this site, but that is not the case. It's a writers group! And we help people master the English language. So if anyone tells you it is cheating to have other people give feedback about your writing, you should explain to them that feedback and revision are crucial parts of writing.