Bro my suggestion is not to live the science it have a grate future and more options for successful future
If u want to choose commerce u can take it if I r interested in it  interested in accounts u will have a grate full job or become a good business  man by it

Not necessarily if you grasp all cincepts faster. You should equallu join coaching institutions and take help of your colleagues and college professors to understand basics and spend more time with tgem to get it cleared. 

Once your basics are strong its gonna be smooth ride. 

Just adhere to time tables and study from right set if books.