If you want to go for a Computer Degree course after your 10+2 with Biology then going for the BCA will be the best choice. BCA have no Mathematics or stream related eligibility criteria. Apart from this if you want, you can also the Diploma courses in-

• Animation & VFX.
• Web Designing & Development.
• Digital Marketing.
• Graphic Designing.
• Mobile Application Development.

Most of this courses don't need the Academic qualification. If you have preliminary skills regarding the computer, then you can pursue this courses.

To know more about BCA, visit the link below:

https://www.careers360.com/courses/bca-bachelor-of-computer-applications

I hope this answer helps. All the very best for your future endeavors!