This is not what anyone wants to hear, but the truth is as an adult you can't perfect a language without studying it. Obviously there are exceptions to every rule! Some people pick up language more naturally than others. But in my experience it's the students who put the work in outside of class that progress faster.

It's also true that we have strengths and weaknesses in language (sometimes even in our native language). A person who aces an oral exam might do terribly in their writing exam. A good student is aware of their own flaws and practices in the areas they find hardest.

In terms of how to study, it depends firstly on your level and secondly on the area you want to work most on: reading, writing, listening or speaking.

If you are at A1 level, you will benefit most from being exposed to language aimed towards that level, i.e. grammar books, language learning podcasts etc. When you reach around a B1 level I recommend looking at real life target language examples such as TV shows, books, news articles and so on. There's not much point coming to them too early and being discouraged by how little you understand.

If oral language is what you struggle with the most, try to find a conversation circle to practice with. Many of these can now be found online thanks to Covid!

Writing is one of the hardest areas to progress in, in my opinion, because realistically you want someone going over anything you write with a fine tooth comb to point out any mistakes. If you need to get better at writing in your target language I highly recommend hiring a tutor or trying out a class that focuses on writing.

Sorry if this isn't the fun answer you want to hear! But don't worry, my students think I'm a buzzkill too 😅