just wanted to add on to this topic, if you are using VS Code, I highly recommend installing the Extension called indent-rainbow
Name: indent-rainbow
Id: oderwat.indent-rainbow
Description: Makes indentation easier to read
Version: 8.3.1
Publisher: oderwat
VS Marketplace Link: indent-rainbow - Visual Studio Marketplace
Looks like this
makes it MUCH easier to see the indentation in your YAML file. In VS Code also you should use the shortcut keys such as Cmd + [ or Cmd + ] to increase or decrease indents.
oh also forgot to mention, turn on visible whitespace as well, thats the little grey dots you can see in the screenshot