If you’ve never used the terminal before, how do you know what to type?

Start pushing buttons. Start typing things, try pressing tab variously. Look up guides, introductions, help.

Sure, but my point is: I don't think I've ever seen a terminal present those instructions when you open it. Unless it's immediately shown in some MOTD or something, the average user isn't going to take the time to figure it out if they don't have to.

If my grandmother wanted to draft a letter on her computer, she'd use something that looks more like Notepad and less like Vi.