Making a better help command

Bash has an impressively bad help command (Completely useless to those who'd actually need it, I don't think I need to elaborate) and zsh doesn't have any. Idk about the others. So I thought of getting the community together to talk about what information should be in it, so that it's a good enough command that it can be universal to standard shells and could realistically be shown to a new user to put them on their way, instead of dumping several dozen commands that may or may not ever be useful to them.

To me, a good one would be:

• No more than like 30-ish lines of text containing no more than two non-list paragraphs, to avoid overwhelming users
• Explains the basic command structure (Command arg filepath)
• Listing under 10 or 12 commands that everyone will use
• Under 5 keybindings
• Enough guidance and dropping enough googleable verbs (One of the most important parts of learning new skills, for me) for users to find their way on more complex tasks (Apropos, man)
• Maybe one or two subsections with more advanced, but still often used topics (Piping and redirects is what comes to mind, because if users are still new and in the copypaste command stage they'll see them) that can be brought up with help piping.

Additionally, we could have a handful (Less than five) commands to help users find documentation without having to leave the terminal and that are recommended to be included with the base install of any OS including this help. I already mentioned apropos and man, and after having it pointed out a little ago tldr seems like a pretty great tool to find one's bearings too.

I drafted a help text here, though it's at nearly twice of the length I'd consider ideal to avoid overwhelming people.