Hi Rahul,

As you have completed 12th in Commerce stream. You are eligible BCA ( Bachelor of Computer Application program) . I have listed some top BCA colleges in Ajmer below..

• Dezyne e'Cole College.
• Aryabhatta International College of Technical Education.
• Hukumchand Noble Institute of Science and Technology.
• Bhagwant University.
• Venus College of Engineering.
• Maharshi Dayanand Saraswati University.
• Star Infotech College.

This Colleges lies within the city of AJmer. BCA program is of 3 years course duration. BCA eligibility criteria is 10+2 Passed with minimum 50% in any relevant streams from recognised board. Admission are done Based on merit basis or Entrance exams of universities. BCA program fees ranges from 1.5 - 6 lakhs for 3 years. I have attached the link for more details about colleges and fee structure of ajmer. Hope you find this information helpful. All the best for admission.

https://it.careers360.com/colleges/list-of-government-bca-mca-colleges-in-ajmer

Thanks & Good Luck!..