Ever programming language is created for different purposes: If you want to go into anything related AI and ML field learn python, if you want work closely with hardware side learn C programming (this one is harder to learn than python) and last but not least Java is is used for coding web applications.
My friends told me that I should learn C first of all. Since I am new to this subject, I did not research enough, but I will research and decide which one I want to do.