There are many things I have to improve my English.
Its many possible answers, but here are just a few pieces my English improve.
First is don’t be afraid to make mistakes. Be confident.
Second is practise the 4 core skills: reading, writing, speaking and listening. They all need to be worked on for you to improve.
And the last one is practise every day. Make yourself a study plan.
Decide how much time a week you are going to spend studying and stick to it.