I mean nobody can start to learn any foreign language in any modality (even immersion) and watch shows in that new language without subtitles a few weeks after with the possible exception of shows like Plaza Sésamo, but even that would be a hard sprint.

The Defense Language Institute has Spanish at 36 weeks, Russian at 48 weeks, and Mandarin at 64 weeks. And those courses are NOT for the faint of heart. They are for folks who can get down and grind on language learning.

Only prodigies could learn in substantially shorter time, like this guy. https://youtu.be/_GXjPEkDfek

You and I are not that guy.