Which language should I learn 1st?

IMHO Python. Why, you ask? Let other people tell us the answer: http://blog.trinket.io/why-python/

It depends. If you need performance, then C (or C++, which is a superset of C, hence more complicated to master it all... but one can program in a subset of C++ too). If you want productivity, then Python, which is far easier, with many high-level libraries, a strong community, etc. If you want to help an existing project, then the language it uses.

As someone familiar with all three of those languages, I would recommend Python for most new projects.

But there are other choices you may want to consider depending on what you're trying to do. For games, for example, I think it's better to specifically learn a game engine. The usual list of game engines that I recommend are GDevelop, Godot Engine, SGE Game Engine, Love2D, and Cocos2D.

Go with Python. The syntax is easy to understand, is well supported, and can be used to program for the desktop, server, and the web.

http://learnpythonthehardway.org/book