If you want to understand everything from the smallest building blocks of matter to the large scale structure of the universe then Physics is the subject for you. Good luck with your studies.
“All science is either Physics or stamp-collecting.” – Lord Kelvin
“Science is the attempt to make the chaotic diversity of our sense-experience correspond to a logically uniform system of thought.” – Albert Einstein
“If I have ever made any valuable discoveries, it has been owing more to patient attention than to any other talent.” – Isaac Newton
“Nothing in life is to be feared. It is only to be understood.” – Marie Curie