The best way to improve your English is to use English frequently.
Usually, you are thinking "Let's study today" or "I will study for an hour from now".
This makes less frequent use of English. If you try to use it without thinking
you will use English more frequently.
I think that it is not necessary to be concerned about English conversation.
Just read the book. If you read even with a gap time of about 5 minutes waiting for a train,
this attitude improves your English. English ability rises naturally.