She wants to shed her platonic status to capture the attention of a friend she has liked for a long time, but who currently only sees her as a friend.
If you're interested in how the show evolved, you might want to look into later episodes like No Risk Jane or Wallflower Jane which featured more extreme confidence challenges. Friend Zone JanePlain Jane : Season 1 Episode 1
Like many "Janes" on the show, the premiere emphasizes that physical changes are only part of the process; the internal work of overcoming shyness is the real hurdle. She wants to shed her platonic status to