I would like to apply for the job offered. I consider myself to be a most suitable candidate, since, even though it is not my mother tongue, I have a very good command of the language. After seven years of learning, I am in my last year in order to get my FCE Degree, in which I believe I will have success.
As I think age is not a relevant aspect to be taken into account, I would prefer to say that I have not finished school yet. Nevertheless, some people would say that I am madurate MATURE enough to compete with other candidates for any job which implies wisdom and responsibility.
I look forward to receiving your reply and to being selected for the proposal.