Hello.
Kindly ask your question again in a proper sequence , as it appears that you want to ask 'Is BCom a tough course ' till this point it is clear and rest of your question is not clear to us, still I would like to tell you that BCom is not a tough course , it depends upon your background if you are from commerce background then it will be quite common course for you , it may looks quite difficult for other stream students ,but it is not you can not complete it.
Best of luck.