Well, for code experiments generally Arch and Arch-based stuff are the best since they have AUR, which allows to make and share packages very easily, which in turn means that there is a literal sea of packages.
Also Arch and Arch based OS's enjoy literally latest versions of everything as soon as they are available (so called rolling release).
I personally use Arch both as a daily driver and a developer workbench.
However, that incredible flexibility and bleeding edge comes with a cost - even Manjaro in the long run may need a significant maintenance effort (unfortunately again have friends which had troubles with maintaining it).
It is not just sth you can install and forget about it.
And stock Arch is not even meant to be installed by an installer but instead you do it manually (quite easy, takes 10 min when you're used to it, but helps understanding how things work).
If you want almost all the coding stuff and godot (except for maybe some more esoteric and/or youngest unstable tools) without having to go into how Linux actually works and how to maintain it, i think you can easily go for any of Mint (though i haven't checked it for a while) or MXLinux. Maintainance and stability-wise Fedora is also pretty ok though it is a bit more "professional" kind of OS.