i'm a native portuguese speaker, currently fluent in English and studying mandarin for two years.
I'm going to admit, i still feel like a begginer, mandarin is known for having a complicated learning curve, but taking in consideration my experince with english, it really is about surrounding yourself with the language.
I guess it's the most common advice, but it does work! To past time go on 小红书, look for films and series in Mandarin, and if you are watching on netflix you can use language reactor extension on browser that offers double subtitles. Make a spotify playlist with songs in the language, and once in a while print the lyrics with a few missing words and try to complete them when listening to the song.
Another think that helped was to play games of forming words by combing hanzi flashcards. Doing it with a few friends forces you to think fast and expose youself, especially if you still feel insecure with your skills.
I wish you the best and good luck with your learning process!