How to remove Family Manager on Playstation?

I don't know much about the Playstation. I would like to get Ps + but unfortunately that is not possible. The reason for this is that family managers are not allowed to do so. There comes a message.

By turning 18.

That's stupid do never give your real age, it is best to reset ps4 hard and create your own profile which was born in 2000. It is easy to remember if what is preferred is 2000