The Community Guidelines are our Code of Conduct. What you’re suggesting sounds like an FAQ entry on how to get help. The pinned welcome post could use an update, you could work on making suggestions to @coderanger for that.
I understand your desire to have new users present questions in a form that is easier to help and welcome improvements there. But I also think the lesson of Eric Raymond’s Asking Smart Questions is that no amount of documentation for new users will remove the need for us to “be welcoming, inclusive, friendly, and patient.” Which happens to be our first community guideline.