Got my first internship as a software developer

So, I got my first internship (RN) as a software developer, but due to my lack of industry exposure, I don't have much idea about corporate culture.

So, I'm here to gain some hidden knowledge, common sense, cheat codes, and other crucial things I should know.

Share the things most interns face, what you all faced, and how you took control of it. Challenges, behaviors, at you 1st day in the office, what things to notice and ignore and anything else you think I should know.