My lil girl Bindi absolutely hates her leash

she thinks its a toy or something. she wont walk with it on her harness. she just flips over and tries to chew it off

any basic help for me to get her to walk on her leash? id love to take her out on her leash in the backyard to get use to it before we go "into the real world." she's 12 weeks now.
any advice appreciated!!