I've done BCA from IGNOU but want to do MCA from a full-time college, which college am I eligible for?

If you have completed your BCA with 60%, you can sit for national level exams like NIMCET, VIT MCA and other entrance exams. Prepare for these exams and if you get a good rank, you will get a good college. Otherwise, you can apply for private colleges according to your location. Good luck.