Hi,

I hope you are doing good. As you have mentioned, you haven't taken french as your major subject in your class 10th and class 12th , but you are interested in French and know basics of it.

I will suggest you to do certain french courses on Coursera and other recognized school that offers a proper certification . More than that, if you can proof that you can read, speak and write french like any other secondary (not native) languages you might have. You can demonstrate your french skills in video and writing an essay etc., then apply for universities and colleges that offers UG and PG degree in French, so that you can make career on it.

After you apply for the colleges, you need to give your entrance exam and it might be possible you would be interviewed.

I hope it helped.

Thank you!