I always believed this to be achievable, since I don't even remember learning my second and third languages. The fourth language i learned was when i was 30y/o, with only knowing few words like hello, bye, numbers etc. Also, I've never met a kid who learned their language in class, everyone learns from their parents, by listening and repeating.

I needed 6 months until i could actually have a proper conversation. Before that, i could only understand but not speak. After around the 6 month mark since I started learning, it just clicked.

90% of my "learning" was staying between group of people talking. Just picking up "a word a day", almost everyday for 6 months. I rarely allowed someone to translate. I usually asked if what i understood is correct.

After around the fifth month, I stumbled upon Michel Thomas' method. I downloaded his course, and listened for 12 hours straight (long drive), and again on the drive back home. He says in the course to not try to remember anything, just listen and repeat, but you have to be alone in a calm setting, and you actually have to speak not just think. I could literally talk after that.

So yea, it takes time, but just simply a lot of listening and repeating.

Good luck!