BCA

To be eligible for admission into BCA, a candidate needs to score at least 45% in their +2. The eligibility criteria is different for every university. Some universities demand for 60% in +2 with Maths and computer Science as mandatory subjects and some universities don't. So, it depends upon from which university you want to do your BCA. Students of every stream can pursue BCA without any problem but the criteria has to be kept in mind before seeking admission. If you want to learn programming languages which you will be studying in your BCA course then you can check out this app which is specially designed and developed for BCA students. It has programs and assignments of languages like C, C+ and Java with their outputs.
https://play.google.com/store/apps/details?id=technark.bca_courprogramming

Yes, you are eligible for admission into BCA. Every university has different criteria for providing admission into BCA, so you can try different universities and colleges and check their eligibility criteria for admission into BCA. You can get admission, but you'll have to find that particular university which will provide you admission. If you want to learn programming languages which you will be studying in your BCA course then you can check out this app which is specially designed and developed for BCA students. It has programs and assignments of languages like C, C+ and Java with their outputs. You'll be studying these languages in your 3 years of BCA.
https://play.google.com/store/apps/details?id=technark.bca_courprogramming

As per your past academic record, your probable standing are as follows:
1. For class 10th, your score is 2 out of 10
2. For class 12th, your score is 2 out of 10
3. For Bachelor's degree (if Science) your score is 10 out of 10
So, Application rating (AR)= 2+2+10=14 out of 30
The shortlisting of candidates or call from IIMA for AWT and PI will be done on the basis of your composite score= 0.3 (Normalised AR score) + 0.7 (Normalised overall score in CAT-2018). The upper limit of candidates those will be shortlisted in your category is 57. The Normalized AR score of an applicant is equal to their AR score divided by average of the top 50 AR scores from the applicant's pool, (the applicants pool in this case being defined as the group of candidates who appear for CAT-2018 and apply to IIMA.)
So, in my opinion your composite score is quite good because of performance in graduation and CAT Hence you have a good chance of IIMA call. Good Luck.