First...let me congratulate you on being the first person to actually pay attention to my desire to have comments HERE instead of on FB/G+, etc
You're not wrong about Ghost's project site being a little sparse. I think they're still figuring out the best way to actually provide true end-user documentation.
Ghost for Beginners seems to be trying to fill some of that role. I haven't walked through it in detail yet, but it looks like a more promising source of information.