I think I’m in somewhat of a grey area because I am half Japanese yet I didn’t learn as a child. That being said, my mom pretty much ONLY speaks to me in Japanese but if there are any other halfies out there, you can probably agree with me in that you don’t have full on intellectual convos with your moms so I’m like … KINDA fluent in listening.
As for wanikani, I’m only lvl 7 after a couple of months and I can already see myself going “ohhhh so that’s what that means”. In a way, I feel it’s unlocking my inherent fluency. I’m still absolute shit with talking … aside from having native-level pronunciation, when speaking, gramattically I probably sound somewhere close to a 3rd grader (but a 3rd grader who’s smarter than the other 3rd graders if that makes sense).
It’s a really strange place to be in because beginner stuff doesn’t really help me at all and intermediate stuff is very often too hard. The bottom line, though, is that I find that it’s definitely helping with becoming more “fluent”. i would definitely suggest to start doing a LOT of listening practice though.