First, you are determined enough, not three minutes. You should want to go to a foreign university. This determination should not be a problem. Then there is the second point: enough enthusiasm. You can't go upstairs without enough language accumulation. Two years is enough.
If you have never been exposed to TOEFL, it is recommended to start with the TOEFL basic class in New Oriental. First, start systematic listening, speaking, reading and writing training. Second, be familiar with and understand the whole TOEFL system. In addition, the teachers in New Oriental may give you a lot of inspiration. At the same time, start a lot of English training in four aspects. It's totally useless not to spend time in class. You must spend a lot of time and energy on your own, just to make good use of the summer vacation, insist on a certain amount of listening training, a lot of reading practice, recite a certain amount of words every day, and then start writing practice after a while. After school starts, you must also arrange the training time, otherwise it will be in vain. I believe that during the winter vacation, your English will make great progress. In general, the English of senior high school entrance examination 135 may drop to 70, 60 or even 50( 100), especially for non-ability students. During the winter vacation, you can apply for TOEFL intensive classes and sign up for the first exam of the second semester.
Enough faith and hard work will bring you good results. Good luck!