Have you seen Duolingo? They have French language courses in various first languages.

I can second the comment that Duolingo is not the best resource to improve proficiency. I use duolingo daily for French. I think its great to do quick exercises, brush up on vocabulary, and be used as a supplementary to your studies. Duolingo also has a product called Duolingo Stories and that is another great supplementary tool for learning as well. I found these websites to be somewhat helpful but the organization is kind of confusing:

https://apprendre.tv5monde.com/

https://www.newsinslowfrench.com/