Hello, there is no neutral on the blind switches. The neutral is from the motor.
As for always keeping your finger pressed, you're buying a push-button, not a switch.
With a push-button, you have to keep pressing it, whereas with a switch, you only have to press it once.

As far as I know, they can be converted from switches to push-buttons. The Feller 7592 is also called a blind switch/button. You can connect the neutral conductor with a connecting terminal (e.g. Wago) if you loop the supply line through the switch.

It is important that the blind switch is not a pushbutton. Connect neutral conductor and E from motor directly to power supply. Phase to switch (sw) connection. Motor connections up/down to the outputs (og) terminals.