I want to learn French language between now and December. I started using Duolingo (self-teaching app), but I think that may take time. Please how can I learn fast using internet? Will Duolingo teach me to a considerable extent in these 4 months or will free online French course be faster? I just want it to be through internet, free, learn in 4 months (to a good extent, if not perfect).

Other suggestions that I didn't think of will be welcomed. Thank you