After 10th you have to go for further education either in 10+2 or Diploma course in Computer Engineering. On qualifying the Diploma course you may give lateral entry examination and opt for BTech Computer science and Engineering with Specialization in Cyber security. If you go for 10+2 then you will have to qualify an entrance and you can get admitted to BTech Computer science and Engineering with Specialization in Cyber security. Now on practicing and doing job in Cyber security cells you may call yourself a Cyber security expert.

This is the academic way you can go for. But nowadays a lot of online programs are there on the topics. So you can follow those courses in order to build knowledge about the subject and on appropriate practice and hardwork you may build yourself a cyber security expert. But this way is a bit risky as if you have no degree you may have to prove yourself in every steps of your career but if you have a degree then you will have to make a bit of less effort as you will certified academically about your knowledge regarding the subject.

To know more about the cyber security courses you may visit the link provided below:

https://www.careers360.com/courses/cyber-security-course

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