I don’t think it is a smart idea to learn French just to get access to language materials written in French.
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You need to have a damn good level in French to do so. If not, you won’t understand everything, grammar, explanations, everything will be so inefficient that you will be begging to learn your target language with explanations in your native language.
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Unless you were forced to do so for a job or for love, I don’t see how you can learn a language to a high level without motivation for it.