I have always been a lover of physics but due to certain circumstances I was unable to take up a physics degree in my undergrad. I was aimless for a while but have now again decided to take a shot at actually studying theoretical physics and attaining that goal. However, I am in a no name college in a country that churns out engineers by the millions and do not have any opportunity to take up electives or physics centered courses. I also have close to no research experience bar co-authoring two conference papers (IAC).

I would love to know how to garner the experince required, research and otherwise. Which courses should I learn? How can I attain research experience?

(for context, I am interested in High Energy Physics but would love to participate in any other field as well

I am also in my second year of engineering.)