Have you ever thought, why you have not studied well? We can see only those who are not used to hard work initially, blame the studies after joining the science group that actually demands hard work.
Lazy people alone say studying science is difficult. If laziness is your problem, you cannot concentrate in the class. It may be your habit to postpone things. If it is so, rectify your mistake. You understand first that you would face the similar problem in whatever course you choose to study after plus 2
If it is not the reason and if you are interested in some other course, you can surely join that course after plus 2. Several courses like B.com, BBA, BCA, and BA in History, Economics, Hotel Management, Multimedia, Designing, and Animation etc. are waiting for you. You can select any course that suits your taste.