Using R lenses on a Nikon Zf - Metering

I've actually been carpet bombing reddit with questions for the last week or so, as I'm seriously considering buying a Nikon Zf to use with my old lenses (I have a Nikon R6 and a variety of R lenses). There's no electronic contacts in the lenses. I'm looking at buying the Metabones adapter, and realise I'll have to do all the settings manually.

However what I can't work out is how I can meter, as the R system did the metering in camera, and I'm not sure that the Nikon Zf will do that. Has anyone got any experience of using R lenses on a Nikon Zf? Or even M lenses (as these seem to be popular application too.....