awesome-godot VS godot-syntax-themes

Some more listed here: https://github.com/godotengine/awesome-godot#projects

-A curated list of free resources for Godot -Heartbeast tutorial and channel

I just did some googling and and I found this: https://github.com/godotengine/awesome-godot

No, i don't really have a general advice for that..all depends on what you want to build. I'd say start simple but as it grows you have to make sure your architecture stays clean, otherwise the whole thing becomes unmanageable. If you want to look at other big open source applications done in Godot look at Pixelorama and MaterialMaker (this one even got an Epic Mega Grant). There is also this list with great apps/pluings etc: https://github.com/godotengine/awesome-godot

The Awesome Godot GitHub Repository has some Template content, some Demos, and some Games (some of which point to GitHub repositories with source code).

What kind of content goes in the list? Is it limited to just GDScript/C#/GDNative addons that can be downloaded from the Asset Library in the editor, or also projects that can be downloaded from the Asset Library in the project manager, or also modules that require recompiling the engine? Is this a general-purpose list like https://github.com/godotengine/awesome-godot is?

Here you go, that's the gold mine: https://github.com/godotengine/awesome-godot#tutorials

I would recommend you to look at this list of plugins and scripts. There are many nice plugins listed.

You can install themes for the script editor as well. You can find them here on github, and it also tells you how to install them.

You'll have to stick with the internal editor. Fortunatelly it's far from being a terrible one. You can go here to get the color theme of vscode, it might help you to feel at home.

If you have a theme installed, you can check your syntax themes at %APPDATA%\Godot\text_editor_themes\ (if on windows).