I wanna start reading psychoanalysis, and particularly Freud, which of his books you suggest to start?

I haven't study psychoanalysis before, i have read a lot in philosophy, i wanna start reading freud, which of his books is better for starting? i want something that is like an introduction to his ideas (like how "the problems of philosophy" or "Logical Atomism" is for russell) , but i prefer to choose one of his own books not a book about him, what's your suggestion?