What foxmoth and Sam said.
At East Mids Airport the limit of my refuelling training was 'Hi Matt, any chance you can fill up Tango Golf for me please?'
I've just got a share in a PA28 at Tollerton - I've had much the same queries as you re: refuelling / startup / procedure... just ask - people are quite happy to fill in the gaps
Edit: oh, and if you've only sent off paperwork to the caa today then they won't look at it until Wednesday at the earliest, then reassess it on Friday... don't ask me how I know