My two cents:
Start with what you know. If you mainly work with Python then learn to create games with it. Download PyGame (or equivalent), maybe grab a book like this one: amzn.to/2uEWUHo and make your first games. Learn the fundamentals (managing state, collision detection, simple AI, sprites animation, etc...) before trying anything else.
Once you feel comfortable with game creation, take a look at some job offers. Identify which role(s) interest you and write down the set of technologies quoted in related job offers, then build a portfolio of games and/or game tools built with the relevant technologies.
Thanks a lot for such a methodical approach. This clears up a lot by not running here and there on C++ or C# for different gaming engines. Sticking to Python for now and trying to come up with some basic games sounds pretty smart to me. Really appreciate the suggestion.
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