I agree with what others told you. If you think you have time to take classes and it doesn't upset your days too much, then
just do it. The more time passes, the more difficult it will be to learn it (because of time, appointments and so on).
If worst comes to worst, you will learn another language.
I studied French when I was 11-13 years old, but at that time I didn't like it and my teacher's method was terrible, so it was boring and useless. It was a pity.
Also, I recommend you to watch videos on YouTube about the matter. I sometimes watch the ones about English (about grammar, useful words, traditions and so on) and they are very useful and entertaining. It is nothing too serious, but it helps your pronunciation and familiarity with native speakers. I think I have seen this kind of videos for Italian too, so I guess there are also for French. They may help you to understand if you really want to learn the language or not, too. You already have the best reason for learning it, though...