How to improve language skills?

Try to use that language in your routine conversation as much as possible.

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1: Practice reading and writing 2: Watch movies or TV shows in the language 3: Find a language exchange partner or a tutor

Consume media natively produced in the language you're trying to improve in i.e. watch tv shows in Turkish if you're trying to improve your Turkish

Language input is key! That is, reading and listening. You should be reading as much native level content as you possibly can. Over time, you will acquire vocabulary and sentence structures such that they feel nature to you. I would recommend reading into Stephen Krashen and his “Comprehensible Input” research. (I own a Chinese language learning app called JinbuPal and we heavily utilize these techniques.)