My aspirations
It is important that you do not waste word count on useless opening sentences that merely repeat the prompt provided. The reviewer will see this as a student desperately trying to respond to the question, when he has not done his research into the university mission and values. Open instead with a direct response to the question. That shall be more appreciated as an informative answer and also, allow you to showcase the succeeding discussion paragraphs.
UWC environment may be an extension of that experience.
How? May be? Why aren't you sure? Again, you have not familiarized yourself with UWC and as such, will probably lose the interest of the reviewer at this point, leading to a rejection of your application. Are you certain you wish to attend UWC? Why are you showing signs of not even having familiarized yourself with the foundation of the university?
I have always been eager to study abroad
You and half the young adults on the planet hope for this chance. You have totally misunderstood the reasoning behind the existence of UWC. Read deeper into the university background. You are not making a good case for your admission at all.