Hello Aman

There's nothing like easy or difficult. To achieve something you need to struggle for it and put your all possible efforts. If you do that.. it becomes easy for you. But if you'll not work for it and just take it lightly.. then you'll find everything difficult. Hope you're getting my point.!
To make your career in any field.. you need to work for it and then only it'll be possible for you to reach the target. If you have interest in a particular field and dedication towards it.. then only go for it... Whether it be Science/Commerce or Arts.
Class 12 is of tough level and so a lot of hard work is required.

Hope this helps.!
All the Bestt.!