Is there a language learning program for parents and newborns?
My suggestion would be a twofold approach: for the parents enroll in a standard French course together, and naturally practice at home, and for the baby, hire a bilingual nanny with the understanding that you’d like her to speak only French to the child. The kid’ll probably outstrip you in a year or two, but by then, you should have a fairly workable vocabulary and you can augment your education and your child’s language re-inforcement by watching children’s movies and reading children’s books in French (and with the movies, you have a built in cheat sheet if you switch on the subtitles.
My family moved to France when I was four and lived there for four years. My parents studied the language and were obviously immersed in day to day life but they struggled whereas my younger brother and I picked it up immediately and spoke to each other exclusively in French – “our language.” Thirty plus years and many bilingual schools later, I retained a great accent and some vocab, but my bro, who left when he was five, doesn’t remember anything. If you really want to do this, it takes mucho work.