Yes and no. Unlike wind and bowed string instruments, the harp sounds great from day one and it is relatively easy to play simple and satisfying pieces after only a few lessons.
However, the harp is a difficult instrument to play to a high standard. Modern concert and orchestral repertoire makes serious demands on the player and lever harps too, have an ever-growing body of challenging repertoire to choose from.
Ultimately, if you want to play simple pieces for sheer enjoyment, the harp is a wonderful instrument that is hard to beat – especially for adults who would like to take up an instrument later in life. If your ambitions take you beyond the simple, then be prepared to put in some hard (but rewarding) work!