Dear CAndidate,

No exam is tough if you are well prepared for it. KVPY exams are generally conducted for admissions to IISER, IISC and BARC. If and only if you want to become a scientist and are interested in research work, you should take up KVPY. Obviously, IISER is one of the top institute for research. So, yes you do have a career. 

For more information on KVPY, you can visit the link: https://www.google.co.in/amp/s/dqxeclau.top/articles/10109-all-about-kvpy-scheme-for-science-students/amp

For more information on preparation of KVPY, you can go to this link: https://www.google.co.in/amp/s/school.careers360.com/articles/how-to-prepare-for-kvpy/amp