至急！！！ を英語に訳すと？

I haven't decided yet, but I'd like to get a job related to English. So I want to learn English at ○○ High School and make a clear decision.

get a job = 口語っぽくてその場限りの感じなので、work in a profession using English とかにしたほうがいいです。
and make a clear decision = これもその場限りの感じがして、決めていきたいというニュアンスに欠けるので、which will help me with my future careers.

I haven't decided yet, but I'd like to work in a profession using English. So I want to learn English at ○○ High School which will help me with my future careers.