You are only a sophomore now, and you want to learn your specialty because of your poor grades. I think you should think carefully. At present, art is not very studious, the competition for college entrance examination is fierce, and employment is not too simple. I think it is possible to improve your grades before the college entrance examination as long as you are willing to study hard, work hard and master some learning methods. Here are some suggestions for you:
Chinese: reciting+doing problems. Not asking for more, remembering mistakes repeatedly. As for composition, it is very good to have your own creativity, but it is even better to combine some classics. It is suggested to recite some classic paragraphs and famous sayings. For example, you can record the classic paragraphs above "readers" and use them when writing. English: Language sense is very important, so read more and recite more. Look at the grammar properly, do more questions, and find answers to explain the detailed counseling books. Math: The method is very important. To sum up your own answer methods, you can buy a tutorial that explains more about this method. Doing math problems is the most taboo. If you look at it, you will make a mistake. So do more questions, don't be quick in the exam, but make sure that what you have done is correct. Master the appropriate learning methods. Many students are fragmentary knowledge points in physics and mathematics, and there is no unified and integrated knowledge. It is necessary to string these knowledge points together and put the knowledge block and knowledge system together. Remember more in literature and synthesis, strengthen basic knowledge and do more exercises.
You are only in Grade Two. You can still get into a good university as long as you work hard now. Many high schools study hard in the high school stage, and their grades are still improving rapidly. I met a student in Pingmeng, whose previous grades were moderate, but later they made rapid progress under the guidance of teachers, and their college entrance examination scores were quite good. I hope my advice will help you, and I wish you success in your studies!