After 10th

There are options to study abroad after Class 10th. Yes, there are many countries which take foreign students after the 10th standard like Singapore. But, you will face many problems like their curriculum is different than in India and even their high school standards, cultural differences and you would have to adjust with being independent. Now best course means many things. First, you need to understand in which field you want to go and then go all out with your effort and focus on it. But, if I may suggest, I would say, you should go abroad for studies after your 12th standard, as you will be more mature and you will have a better idea what course you want to pursue and from which country. One of the option is to study in Singapore after Class 10th through http://www.motachashma.com/scholarships/sia-youth-scholarship-ministry-of-education-singapore.php
The whole education is funded by the government of Singapore, but it is quite difficult to get that. https://studyabroad.shiksha.com/student-guide-to-singapore-guidepage-266This link will help you a lot.