How to avoid forgetting a language?

In this video, Alisha answers 5 questions. - I'd like to know the meaning of the expression ""weird flex, but ok""? And how do I use it in a sentence? - I'm good at english but due to a lack of practice i've kinda lost my touch because i'm sick and tired of the learning process. So i'd like to know how to keep my english up. please! - What is the difference between ""may"" and ""can""? - i always wanted to know the meaning of the sentence ""don´t get twisted"", even though is not used very often. - Is this sentence correct? ""The color of shirts of players""? Could you explain more about two possessive nouns in a row?