To me, a cup of olive is too much for most people...especially 'newbies'.
And I agree with the previous poster, too. The type of olive oil can make a major difference. The preferable olive oil is Extra Virgin...cold or expeller pressed (cold is best).
Many of the olive oils sold in stores, are mixed with other hydrogenated oils (but it's not on the label)...which is because the manufactures aren't telling (but they have been called on the carpet for doing it). Sadly, Bertolli, one of my all-time favorites (that I used to SWEAR by, at least for cooking) is implicated in the "scam".