Thanks. I guess I'm in a chicken/egg situation here. I am not able to reach any DMR repeaters from my home QTH, so the only way I'll get on to DMR is through a hotspot. I know how DMR works, but have no way to prove the radio is set up properly if I can't get into the DMR network: which requires the hotspot to be working. The manual is, as you indicate, written for a total numpty who only needs to switch the radio on and press buttons.
No worries. I'll get it sorted out somehow. Maybe I'll write it up so that others can get started with a new radio and hotspot: because I've failed to find anything like that on the net so far.