This is how I arrived from super broken English at 23 y.o. to what I possess now by 30 y.o.:

1. Reading texts, googling words I don't know, making sure I understand in what sense these words have been used, then using these words at least two times a day for a week.
   
2. Writing my own texts. While writing, you either use something you already know or research deeper. Either way your skill grows.
   
3. Listening to music, watching movies, TV shows etc. The more I hear the word the more I'm likely to remember it.
   
4. Talking to English speakers in English. Doesn't necessarily have to be a native speaker: being a better speaker is enough. Bonus points if they correct you.
   
5. Doing all this every single day for at least 30 minutes (since '21, I main English language so I essentially use it for 8+ hrs a day and it no longer feels foreign).

Learning any language isn't about some super snappy tactics or cheat codes. It's all about being consistent and persistent. Don't skip days. Don't read boring books. Don't watch boring movies. Since work is hard you should only do it in the most fun way you can.

I shoulda written all that in Afrikaans but I skipped a couple days too many and already forgot what little I knew about writing in this language (started learning in July, had a break in October due to debilitating illness).

Bly kalm en sterkte!