Dear aspirant,

Hope you are doing well. As per your query and according to me definitely you should pursue BBA and then MBA and be specialized in finance in both the degrees as it will be a much better option than the former. This will open up a broad range of career opportunities for you. Though the former combination is not bad still this will much better. Hope you find this helpful. Thank you.

Both Bcom and BBA courses are equally good. But if you study BBA then try to do it from a reputed University like Symbiosis University or a good college of Delhi University. But you can pursue Bcom from any decent college. Pursuing Bcom would be beneficial as you'll get to learn a lot of extra things whereas everything in BBA syllabus will be covered in the MBA program, most probably in the first year only. So go for Bcom and then MBA. 

All the very best