As far as I know, the Z1 will only connect with the Street View app in video mode, not in photo mode.
I haven’t tried video mode, but I got my first 50 panos uploaded and validated by taking jpg shots along a local rough road/path, controlling the Z1 with the app on my phone (absolutely necessary otherwise your photos won’t be GPS stamped). I then removed the nadir (me and the selfie-stick held above my head) from each photo in Photoshop before importing them into 3DVista, which I used to connect the photos, place them properly on the map, then upload them to GSV. Pano2VR would have been a better option as it is cheaper to buy and will remove the nadir in bulk mode (and has many other GSV functions, so worth investing in if you have several other locations in mind). Or you could just transfer the photos to your phone and then upload them to GSV via the GSV app (although I suspect the app may be more stingent about spacing between photos).
Google recommends taking photos no more than 8 metres apart, but sometimes I stretched it to 10 metres when I had good line of sight, and that worked fine (perhaps because I pre-connected and repositioned them beforehand in 3DVista)
There were a few bugs in my upload with one or two photos not connecting to their neighbour (despite being connected in 3DVista), but you still get your trusted photographer badge …!
Be warned that the online register of trusted photographers doesn’t list new photographers for the moment, so don’t expect to get listed. But you will be able to use the badge in your marketing materials