While learning the basics of software development I'd recommend Python. It'll force you to get in the habit of properly formatting code and doesn't have as many syntax related necessities (like ugly semicolons)

To learn how a computer manages memory and other advanced concepts I'd recommend C.

Also, when you hear of a new language you haven't heard of before look into what the designers had in mind when they created it and what makes it unique, it'll introduce you to different ways of solving similar problems

Very nice, thank you!