There are many colleges and universities offering paper technology course at diploma and post graduation level. 

To study for the course, after your 12th in pcm , you need to get the required score in entrance exams depending on the college you are interested in like Jee mains, GATE, jee advanced etc

The following link provides entire information about the course and colleges offering it.

https://engineering.careers360.com/colleges/list-of-pulp-and-paper-technology-colleges-in-india