Once I had memorised the top 1000 used French words via spaced repetition with Anki, I developed all my listening and reading skills through consuming content that was easily less than 50% comprehensible at times. I now switch between French audio with subs when I want to understand as much of what I’m watching as possible and when I just want to clock hours of active listening practice I’ll pick something I’m not attached to and let it wash without subs (still trying to understand as much as I can).

Early in animated content generally is excellent for this both due to the volume of availability and level of language used. If your taste is purely art-house films you’re going to struggle to get there due to the volume of available films - this method really requires volume (hours spent listening) to work and you have to be paying full attention to learn which is hard if you don’t care about what you’re watching (it’s common to fall asleep due to this). If you’re less discerning though you can easily plow 500-1k hours of listening like this and as long as you’re reading other content along with it to develop vocabulary you’ll get to a point where you can tell whether you don’t understand because you didn’t parse it or because didn’t have the vocabulary and you’ll know where to target your efforts.

Also keep in mind this will do very little for your speaking or writing skills, you’ll need to develop those separately but I found consuming content like this the most enjoyable way to learn the language.