Meter levels on gain staging

To start a mix off, do you begin with faders at 0dB ?

On gain staging, I try to have my peaks between -18dBFS and -10 / -12dBFS - but I’m never quite sure where the ceiling of that window should be… or if I should have my faders lower?

Where do you aim to get your peaks at this point in the process on the Cubase channel meters and master meter?