Please guide me (student) for btech course selection.

Hi engineers I'm a student looking forward to have a carrier in engineering sector. I am looking forward for energy industry, renewable energy. What major should I choose. With the written entrance exam I am able to get energy engineering . I am curious about the job sector but researching more finds nothing for btech. While my parents told do it as ms or mtech, after btech in ece eee or mech. Please share your opinion it will be really helpful.