It’s really very simple, if you have to ask don’t do it.
Form what you say the owner doesn’t have a clue and from what you say neither do you.
People who are successful in this business don’t ask they do because they already know.
Once they get going they will throw ideas around at places like this trying to fine tune things but not to keep a project afloat.
You have the right attitude to be successful, just go work for a few successful restaurants to gain the experience you will need, stay away from losers until you know how a winner does it.