B.Com Scope

Dear Shahabas,
There are various online courses available for advanced excel. Please find below a few links for your guidance:
1. https://www.udemy.com/advanced-microsoft-excel-2013-online-excel-course/
2. http://www.lynda.com/Excel-training-tutorials/192-0.html
3. http://chandoo.org/wp/excel-school/

Largest share of Indian IT industry is software application development and support in BFSI segment. With your basic knowledge of commerce, if you learn computer application chances of your success in IT industry are high. Therefore MCA after B Com is a good option. All most all universities offer MCA degree. You can choose university based on location, faculty, facilities and placement record.

Dear Prashant,
For most of competitive exams, the minimum qualification required is graduation, so, instead of confusing yourself focus on your graduation studies.
Good luck.

You can go for corporate finance, accounting, tax and business management. You can opt for courses like CFA and FRM to get into investment banking and risk management respectively.

Hi Dheeraj,
Can you specify which field are you looking for job? Also, do you have any other certification apart from B.Com? Also, if you narrow it down to the country of your preference and then apply to job portals with the relevance of your degree, it might help.
Any foreign country who is looking to absorb manpower looks for skilled labor, semi-skilled and then for the non-skilled ones different categories are there.
Thanks.

Yes, it's a good option.

Go for a professional course like CA or CS. They both have a great opportunity ahead. The most recommendable is CS.
Good luck.