I think ive done it!!! can not thank enough!!!

Thank you for replying, i saw a vid about doing the dumpprivkey but i get this error: Error: Please enter the wallet passphrase with walletpassphrase first. (code -13)

ive bought 0.0435 BTC bitcoins and sent it to the bitcoin core but its saying its gonna take a year to sync. i need to order something tonight, im a total noob and help will be appreciated!!