Economics

Hi,
Absolutely yes, you can surely pursue a course in Economics after class 12th depending on the college you wish to get into.
Eligibility-
The minimum criterion of eligibility needed to be met for admission to the course is a 10+2 or equivalent qualification from a recognized institute/ university with a minimum aggregate score of 50 (mathematics being a must). Candidates awaiting their final examinations results are also eligible to apply on provisional basis.
The general procedure for admission to the course is merit- based, I.e. on the basis of the merit obtained by the candidate at the 10+2 level. A few institutes also conduct entrance exams for admission to the course. Thereafter, rounds of personal interview may follow.

The level of difficulty in MA Economics is actually depends upon you. If you didn't have studied maths at 12th level or if you don't shows interest in mathematics then it would be very much difficulty for you (Difficulty level can be 09/10). Because maths is the essence part of economics. Without the knowledge of maths, you won't be able to find the 'Time Value of Money', Bond and Stock valuation, Price determination under different forms of market, Managerial Economics. All these requires higher level knowledge of calculus, algebra and probability. The concepts of differentiation and integration helps you to formulate the policies by knowing the maxima and minima. If you are from non-maths background, then I will recommend you take tuitions of advance maths for your better performance during college. Otherwise it will be very difficult for you.
I hope this helps.
Best of luck.