Go to the page https://golos.io/<account name> and open wallet tab. Let the account name is anazarov.
Fields at top of the left menu indicate actions that can be performed by the account. Choose the action convert.
In opened window, you can take the conversion action you need.
To stake the tokens CYBER you need to click CYBER and CYBER -> STAKED.
To unstake the tokens CYBER you need to click CYBER and STAKED -> CYBER..
Amount of tokens CYBER is indicated with an accuracy of four characters after the point.
Operation cannot be performed if there are not enough funds on the account balance. In this case, the message "Insufficient funds" appears.