It is said that as soon as we have decided to do something that is always the right time. Therefore, if you are deciding to study abroad now, then let us consider that this is the right time to move & study abroad. But yes, of course there is a right time for everything. Moreover, you have eligibility criteria as well. Just after your class twelve exams you can decide to study abroad. The eligibility is 16 years at least. You can apply for an undergraduate or a post graduate course in any university anywhere in the world as per your choice. Not only for undergraduate & graduate course, you can also apply for a doctorate or a post doctorate degree. There are several universities with end number of courses & you are fortunate enough to have end number of choices to select from. There is actually no limitation as far as age is concerned. Any time you are open to visit abroad to study.
Countries like USA, UK, Ireland, Dubai, Australia, New Zealand, Germany, Canada, Singapore, China, Japan, Russia has a number of standardized universities who provide end number of courses. They have degree & diploma courses as well. They have courses of one year to two years duration. Some of the universities are traditional & few are modern. You have a choice of selecting any university among these.
When the question arises when can you study abroad. Here we need to work on few aspects as well. When can you consider that yes you are eligible to study abroad? Well! If you have planned to undergo an undergraduate course in a fairly good university you need to score well in your class X & XII with good percentage in English. Similarly, if you are deciding to undergo a post graduate degree/diploma then you will need to score well in your class X, XII & graduation with good percentage in English.
You will have to qualify few tests before you can study abroad. Tests like GRE, GMAT, IELTS, TOEFL, PTE will have to be qualified. GRE is the Graduate Record Examination which is specifically required =for study in USA & Germany. Rest for all the other countries you would require to qualify IELTS or TOEFL exams, both of which are English Language Tests. But, on the other hand, if you have a very good score in English in your class X & XII exams then you do not require appearing for the English language tests. Many training institutes in India provide IELTS & TEOFL training. They also give complete guidance of tests, the date & the exam center where the exam will be conducted.
Before you finally decide, better speak with your study abroad advisor/counselor who would be able to guide you in a proper way. Your parents should have complete cooperation & full support in your decision to go abroad. If you are in the process of finalizing the country & the university, then it would be suggestive to enquire about the university well & about the area where you would be staying. This need to be done before you finally decide the country & the university. Finally, always begin your course from the beginning. Do not think of starting the course in India & completing the rest of the part abroad. That may not be possible always & moreover, you will not be able to keep a track of the education system here & the system there. Start from the beginning, complete the course & only then come back to your home country to serve it in a better way.