She like all other has sinned and was a sinner
Romans 3:23 For all have sinned, and come short of the glory of God;
Isaiah 64:6 But we are all as an unclean [thing], and all our righteousnesses [are] as filthy rags; and we all do fade as a leaf; and our iniquities, like the wind, have taken us away.
Romans 3:23 does not apply to Mary; if it did she would be not merely a sinner but also someone who is not seeking God, whose "mouth is is full of cursing and bitterness" and whose "feet are quick to shed blood" (vv 11-15). What you cite are generalized statements of human sinfullness.
The angel Gabriel said, "Hail, full of grace, the Lord is with you" (Luke 1:28). The phrase "full of grace" is a translation of the Greek word kecharitomene. It therefore expresses a characteristic quality of Mary. The grace given to Mary is at once permanent and of a unique kind. Kecharitomene is a perfect passive participle of charitoo, meaning "to fill or endow with grace." Since this term is in the perfect tense, it indicates that Mary was graced in the past but with continuing effects in the present. So, the grace Mary enjoyed was not a result of the angels visit. In fact, Catholics hold, it extended over the whole of her life, from conception onward. She was in a state of sanctifying grace from the first moment of her existence.