Harry Potter the master of none

Harry Potter became the master of death and later realises he cannot age nor can he die, he's been through three wars, and the world is dead everyone is dead and the last of the muggles died torturing him. he decides he has had enough and apparates into space to die however he doesn't die and ends up bumping into a space ship years later, all kinds of aliens band together on this space ship to explore new planets and find the rumoured time planet where harry could in fact go back in time. the aliens have never seen a human before and much less a magical immortal one how will they deal with his shy nature and scarred body, more to the point how will they deal with his obsession to dangerous animals he claims are cute, and how will they deal with his strange habit of putting himself in danger to save others of the crew, its unheard of !

yeah the description isn't all that good but I promise the book will be good give me some criticism in this book please I need to grow as a writer. (I already know about the grammar)
xoxo enjoy
-k