I believe that Telemachus is a hero based character because of the elements of a hero's journey he has like one of them would be call to adventure. He is the only one on the land that thinks his father, Odysseus is alive but everyone else disagrees with him even the wisest people. This is call to adventure because he wants to find his dad although no one else believes he is alive, but the suitors allow him to take a ship and some men to go out and find him. Another reason that makes Telemachus a hero based character is that he stays loyal to dad and his thoughts. His mind is never changed or persuaded that his dad is dead and Odysseus has no chance of surviving. Its loyal because its always stays the same and focuses on finding his dad and having faith he is still alive.
This far into the book Odyyseus is not a hero because he has not completed any of the elements needed to become a hero based character. Like he has only been on Calypso's island just celebrating and having fun all the time while Calypso falls in love with him although he's a mortal. This is not a deed to become what he soon becomes later on in the book. Also he makes no effort to get off Calypso's island or ever talk about ruling his land and being with penolope again. If he were to do this then that would of maybe a small step of becoming what later on does, a hero.