Hello B.Pawan Reddy,

Computer Science is very vast field,there is a lot of scope.

As you are passionate in computer science you can learn different 

programming languages like-C,C++,C#,Python,Java etc. on youtube

or by online courses .

You can also learn different things in computer science through NPTEL.

After completing 12 you can go for B.tech/B.E in CSE ,BCA etc.

Thank You.

Hope it was helpful. 

Dear if you are interested in the field of Computer science, you should know about the basis of computers then you can know about languages of computer might you heard about c,c++, java, python etc programming language. I suggest you, used a youtube or google platform and get knowledge about computers you to get a proper idea about computers.If you can do bachelors in computer science stream after your 2puc.

All the best dear