I’m Dutch, and English is my second language. When I started writing in English, Google Translate was my best friend. My sentences were short, sloppy, wrong, and clunky, but I kept trying. I recognized more and more words, and eventually, stories just started to flow out (this took me over 4 years plus English class and a lot of practice), now, my English is almost better than my Dutch. It has really helped my at school as well, and my grades went way up (I do hate it when people are like “You’re just so good at this! It’s unfair!” like yeah bish I took me over 4 years and at least two hours practice a day, if you did that you’d get better at it as well!).
So my tip is, very cliche, keep writing. Keep expanding your vocab, keep reading English books, texts. Google Translate is not “evil” (no matter what teachers say), I think Google translate is actually God-send. It shows so many synonyms, plus all definitions, plus examples of the word used in sentences.
I’ve improved a lot, but it will take time, sadly. I think it really payed off, though, because I love writing.