Hello,

To pursue MS in aboard you have to appear some exams which will make you eligible for universities.

About the hard part, Yes it is hard but you can do it by doing hard work to understand the concepts and learning how to solve the numericals. This will keep your basic knowledge strong.

You have to clear the exams like GRE,TOEFL,IELTS and have to clear it with a good rank. This is the basic and major criteria.

to be eligible to travel aboard, there are some rules and regulations and you have to follow them.

Hope it helps!