I don't know if Steemit is much like Facebook. There's no real profile, no central photostorage, a lot less social interaction in terms of linking other interesting stuff.
So far Steemit seems mostly a platform for short-term (1-3 days) messages, discussions and blog posts. I am not sure what kind of social network that makes it, maybe a cross between twitter and reddit? But I don't think it's much like Facebook at all in it's current form.
i see it improving a lot in the years to come as we post more and more on it and more folks join
Most of the social/community happens in various Discord servers.
I use IPFS to store photos but I have a computer on at almost all times.
Good call on the cross-between reddit and twitter. Though there are other UIs out there that chsnge the experience. I hear good things about chainbb and its forum like organisation.