A terminal twenty-something comedienne who sacrificed her social life for unfulfilled stardom struggles to dupe the quixotic gigolo she falls for into becoming her hospice nurse so she won’t have to die alone.

Yep, that is right Richiev

"After she's diagnosed with agressive cancer an unsuccessful comedian sells all she has in order to live the good life for her last few weeks, but trouble arises when the male escort she hires, so she won't be alone, falls in love with her."

I would say, being diagnosed with cancer would be the inciting incident since unfulfilled stardom is more of a situation, not a specific event.