Hello Naveen!

If you wish to study in the US after 10th you will have to do your 11th and 12th grade in a US high school system. This may be a public (free with grants and loans) or private (costly with no grants) program depending upon your academic qualifications before 10th. But this decision of yours maybe very tough, from adjusting to US school life, culture, staying alone all by yourself in US at such a young age and finally obtaining visa for US entry. Moreover, the cost of living in school dorms is also very high, upto Rs 10lakh per year(dollar is a huge currency compared to rupee). So, if you are from a middle class family beware.

If you want to get in top colleges in the USA they look at your achievements from class 9 onwards and need you to score really high in tests like SAT/ACT. Generally, English proficiency tests like IELTS/TOEFL along with your transcripts, resume/CV, essays/statements of purpose are the basic requirements for colleges abroad. So, this isn't that easy. It will cost you a lot of time and money at a time.

If you want to know which course you should go for, there is no such rule because you have just completed your 10th. You can go with your choice of subjects entirely. And it totally depends on your interest,i.e which subjects you enjoy to study. There is no best course in USA, because all kinds of courses have found vast scope there.

Read the article below to know about the SAT exam:-

https://www.google.com/amp/s/studyabroad.careers360.com/articles/what-is-sat/amp

Read the article below to know about the english proficiency tests like TOEFL:-

https://www.google.com/amp/s/studyabroad.careers360.com/articles/what-toefl-test/amp

I would say it is fine if you take this decision of moving into the USA for undergraduate studies after 12th. Because it would be easier for you to procure scholarships.

All the best!