I'm looking to migrate my current account, created years ago when I was a child and with a badly unprofessional nickname, to another more serious Google account.
My current account is connected to many services and has also a Google Drive billing associated to. I have Photos on Google Photos and a Google+ Profile with pages. Moreover I have bought Android Apps on Google Play Store.
For what I can understand the situation will take a lot of effort; in any case what would the best strategy be to migrate completely a Google account to another?