hello aspirant,
you cannot come in engineering field. as you have don't b.com. there are some lateral entry examination where bsc pass candidates can participate. as you have taken b.com I think your science background is not that strong. The MCA eligibility criteria is any graduate from any discipline but should have mathematics as one of the subjects in 10+2 or graduation. but as most of the MCA students are from bca and btech background or bsc background you may face a great competition while studying with them. hope you may understand.