If I may join the discussion, the world's ten biggest languages are (in this order): Chinese, English, Spanish, Hindi, Turkish, Russian, Arabic, Bengali, Portuguese, and Japanese. So yeah, it could be a good idea to learn Spanish. Be happy you have the opportunity to learn it in school. It's always harder to learn languages the older you get.
I don't want to come off as a wise-ass or something, or shove facts up your face. It's just that I know four languages and I still think I should know more to get by. Only English isn't always sufficient.