Telangana

I can suggest you about IARE college, having a course in cybersecurity but I think you have to go through iot and blockchain with your own interest. But anyways, lecturers will definitely guide you in every possible way, if your are really passionate about it. Just checkdown about professors, many of them are having good research background and can help you through. Anyhow, this is regd my knowledge. Can make a conversation if more information needed.

If your JEE rank stands in range of 25,000-30,000. You can get CSE with your score. Try upto last round of counselling. Wish you luck.

Yes, you can get a seat in Sastra University with your score.

Yes, you can get seat in sastra university, as you haven't mentioned any branch preference. You can have a chance to get EEE/civil/chemical branches.