MCA

Eligibility for MCA:
Any graduate who has passed or appearing for the final year degree examination in any discipline (Science, Commerce, Arts, Engineering or any approved university) is eligible to apply. Candidates must have mathematics as a subject in their 10+2 course or any one year of graduation. BCA qualified candidates can also pursue MCA.

Please refer to the link provided below where you can download college brochure which contains details regarding admission protocols followed to secure a seat in Fergusson College (FC Pune) for MCA.
https://www.shiksha.com/it-software/course/master-of-computer-applications-mca-fergusson-college-fc-pune-fergusson-college-road-109968
Alternately, visit college website for details regarding admissions for this course.
(Website:-http://www.fergusson.edu)
All the best.

Two things, one the answer by Partha - tough to shift from commerce to Science. So, probably an MBA or an MS in Finance are options, but not MS in the Science stream. Second, US typically requires a 4 year UG education. B.Com is only for three years, and so 1 year M.Com may be needed.

Admission is based on the marks obtained in 10+2. Interested candidates can apply online/offline with required information. Minimum Eligibility to Apply is a pass mark of 60% in class 12 with mathematics or computer as subject. For further details regarding this course, please refer to the link provided below:
https://www.shiksha.com/it-software/course/bca-mca-techno-india-university-salt-lake-city-kolkata-237668

As long as you have sufficient proof to justify that you did some work (even part-time), you will not have any issues.

Hi Omkar,
Yes, surely you can do it if you have interest into it is very said that interest in the subject you are pursuing is a necessity for the advancement of your growth
So take it up and keep your hard work up always.
My best wishes
All the very best.