If you're looking to stream or download Season 1 in 720p resolution, you can try the following options:

The brilliance of the first season lies in Deb navigating Jane’s high-pressure life while mourning her old one—including her grieving fiancé, Grayson Kent, who ironically starts working at Jane’s law firm. Why 720p is the "Sweet Spot" for Season 1

The first season of this legal comedy-drama premiered on July 12, 2009, and consists of 13 episodes Drop Dead Diva (TV Series 2009–2014)

: Provides the first season for purchase in HD, with individual episodes available for about $2.99 each.