Here the biggest question is finding itself a answer that what is self? what individual self is? is self only about individual or it is consists of more from surroundings too?

And here this article tried its best to bring all questions a conclusion-"The Self In Modern Psychology" can go through https://buddingpsychologists.org/the-self-in-modern-psychology/

this question is something an individual has came across at least once in their life.

so must read and mention in my comment if you liked the reference. 🌼