You and the parent comments have said basically everything that I feel about learning a new language, but I'll still add..

When you're a kid playing with dinosaurs with other kids, you're all saying things like "dinosaurr! Rawrrrr! Dinosaur! Pshhh!" But with adults the conversation would be "Dinosaurs have been extinct for 60 million years, but there's substantial evidence that birds are the evolved form of dinosaurs today." As a new learner you would never understand that, but from the kids you would learn the word "dinosaur" very well.

So as an adult, how do you find other adults who want to play with dinosaurs