Yes, you can do a BCA (Bachelor of Computer Applications) after your 12th grade. The majority of universities and colleges demand that candidates have passed their 12th standard from a recognized board with a minimum of 45-50% marks. Although certain institutions prefer mathematics or computer science students, most accept students from any stream (Science, Commerce, or Arts). Some universities also demand clearing entrance exams for admission.
BCA is a three-year undergraduate course that deals with computer science, programming languages, database management, and networking. It is a great option if you want to pursue software development, IT, and allied fields. You can go for higher studies such as MCA (Master of Computer Applications) or join the IT sector as a software developer, system analyst, database administrator, or network administrator after BCA. With the increasing need for IT professionals, BCA has wonderful career prospects in private as well as government organizations.