@Wigatron
Godot is probably not a good place to start if you don't know how to code at all. There are a number of challenges present when learning how to code: first, learning to write a programming language; next, learning the principles of coding which are present in every general purpose language; next, learning to use the engine's code alongside your own code, which is a huge chore even if you know how to code. The former two are hard enough in isolation, and also necessary in understanding how to use the latter. Exacerbating the issue is the general lack of community and tutorials for Godot compared to the other big guys (Unity & UE4).
Personally, I used this website to learn how to code years ago: https://learncodethehardway.org/python/ This site is intended for people who are absolute beginners at programming. Python has the added benefit of being very similar to GDScript, so you should be able to move between the two relatively easily. You could also try your hand at a C# tutorial since that's going to be in Godot 3: http://csharp.net-tutorials.com/ However it's more so intended for people who already have some grasp of programming, so it may be better to begin with the first resource.