I recommend using GDScript instead of messing with C#, which is supported but much more difficult to set up. GDScript is really similar to Python, the editor has Intellisense/autocomplete (even for strings!) and all the documentation is built in under the Help menu. It's a very very pleasant experience overall. It's also the first time I've been able to work fully offline thanks to the extensive built in help, and this does wonders for productivity.
Unity feels like Windows, they stack on top of each other all the latest shiny features to attract customers resulting in a massive mess instead of thinking about a coherent overall architecture/UI. Their latest ECS system is an eg of this, they have just stacked on top of the pile a more FP approach although their architecture is not necessarily designed for that, but hey, FP and data-driven is trendy so let's add this too on the pile .
The real drawback right now with Godot is the 3D renderer which is okay but clearly not on par with UE or Unity, but 4.0 is coming with a re-written from scratch new Vulkan renderer.