itch.io

Yeah I’m also a little concerned about GDScript not being useful outside of Godot. 
But for me as a relatively new programmer (1 year experience) it’s helping me learn the problem solving skills needed for programming. Not only that, it’s fun to use Godot to make games which is better for me than Unity, which I find frustrating. More games I make, the better I get at problem solving (hopefully!). 

The C# support is getting better so I’m hoping to use that in future too. 

Apparently, Unreal is planning to release a GDScript-like scripting language. (I'm really looking forward to that because recompiling the entire engine just to avoid Blueprints is an absolute pain and I REEEEEEALLY don't care for visual scripting. Personal Preference.)

C++ is a bit of a pain (I hate writing memory managers), I like C# much better! And using it is definitely one of the reasons Unity took off in the early days. (And GDScript is really just a stripped down version of Python, so I've taught it to people as a gentle step into scripting languages.)

That said, I would encourage anyone who wants to go into AAA development to learn C++ simply because there are a lot of jobs out there looking for that skillset - and it is getting harder to find, which makes it more valuable. It is the backbone of both Unreal and many major titles (World of Warcraft, for example). I tell my students that I recommend any game programmer (again, who wants to work for a major studio) should learn at least 1 scripting language, C#, and C++. Knowing all of those means you can pretty much learn any coding language thrown at you.

But in the end, I feel like picking a language (or even an engine) is a lot like picking a fashion style. There may be some job requirements you have to deal with, but on your own time you should go with what feels comfortable for YOU.