How to learn and reach the C1 level?

Hi everyone. I’m french and I’m an english learner. I think I’m bewteen the level A2 / B1 in english my goal is to get the level C1 and I wanted to ask you some questions.

  • Can reach the level B2 before September ?
  • I personally prefer to learn sentences than words. How many sentences should I learn everyday ?
  • How many months does it take to reach a level (example A2 to B1) for you and the average joe ?
  • How much time do you study a language per day and how many months from the level A1 to C1 when you start to speak a language ?
    My method is just to immerse myself in an english environment. I try to watch series, movies, listening to music and podcast. I learn sentences everyday, I read Dialogues too, I try to write down stories in french and then I translate them in english and I try to say them. And of course I try to practice with native as much as I can.
    If you could tell me what you think about it. If It’s good or not.
    I hope you’ll answer.
    Thanks.