Low time preference advice: learn Common Lisp. The essence of Common Lisp is that it is a programmable programming language. Most other programming languages lack the sort of programmability that Common Lisp provides. That probably doesn't make sense to you now, but I promise it will make sense eventually.

A word on the parentheses. They may seem superfluous at first, but they are extremely important. After learning Common Lisp, you will miss them in other languages. I know I do.

Here's some free books on Common Lisp: https://gigamonkeys.com/book/ (2003) https://www.cs.cmu.edu/~dst/LispBook/book.pdf (1990) https://leanpub.com/lovinglisp/read (2011, gets updated periodically)