Account Migration has not begun. There will be an in game message when it's your turn to move. Do not fall for any third party websites that are telling you to migrate NOW. They're trying to steal your information.

when i logged out of my mojang account so i could get the latest version of minecraft i logged back in, everything apart from my worlds were gone 2 of them are locked because they included a world template that i now have to RE-BUY like everything else i have previously bought 🙁