yea, what do you mean by 'goddess spell'? if you mean say some words and become a goddess then no i'm afraid. magick doesn't work this way. even with people who became gods [Imhotep, Buddha] they didn't proclaim they were gods, their actions in life made people want them to become gods, and in death people still worshiped and turn to them for help. [even saints in the catholic church. many were humans who did wonderful things and it is believed in death they became something more]
if you wish for a spell to find your goddess, there might be a chant or something, but it usually requires some soul searching and quiet moments alone in reflection. [if this is what you wanted i'll include some information after to help] same goes with 'find your inner goddess' meditation, reflection, mindfulness, practice, journaling, a lot of self work.
i doubt anyone would call you stupid for asking this question [harsh wording of 'not possible' but not outright stupid] you just need to explain yourself a bit more.