2. Usually grades are very important, which is one of the thresholds for entering an excellent university. Fortunately, you are only a freshman now, so you have plenty of time to prepare. I suggest you work harder and try to keep your GPA above 3.5 (at worst, you have to be above 3.0 to apply for a good school).
3.4. TOEFL scores are not required by all American universities, but if you want to apply for a better university, TOEFL scores are generally required. Universities in the top 100 generally require 79 points or more. I suggest you take a TOEFL class in your spare time and try to get rid of TOEFL before the third semester. As for GRE and TOEFL, the test order varies from person to person. Some people take t first and then g, while others do the opposite. My suggestion is to take t first and then g, from t to g is a gradual process.
4. There are some additional conditions for applying for American universities, such as social practice, club activities, awards won during school, etc. These are not necessary factors for applying for a university, but they will add points to the application. I suggest that you can take part in some club activities, competitions or social practice in your spare time, or you can be a volunteer and take part in a charity sale, which can help others and improve your self-cultivation.
The key to the four-year undergraduate course is to manage the last year well. Don't put too much pressure on yourself, be calm, but work hard in action. I suggest that you should first listen carefully and keep good academic performance; Second, English can't be relaxed. You'd better sign up for a remedial class, such as New Oriental. In addition, you can learn about American universities first and choose some universities that suit you and are more desirable as your goals and motivation.
6. The intermediary is mainly responsible for helping you make plans, apply for schools, and write all English documents (resume, PS, recommendation letter, etc.). ), which can save a lot of time and reduce the trouble of detours. In fact, you should make a plan for yourself from now on, and DIY will be no problem at all.
If you have questions, you can continue to ask:)