Well, it is at least a starting point. Also what Constantin said is also absolutly right and needs to be kept in mind.
What would be your starting point Nick?
And to specify again what I mean with TV/ENG-Guys as I don't know if it is the same in other countrys:
The Position is mostly called 'EB-Assistent', sometimes 'EB-Ton' (EB standing for electronic broadcast) and you would be part of a 3 person Team with camera and editor) Doing sound is just one of the things that you would have to do. You would also drive the production car, carry the tripod, help with lighting things, keep the discs or cards in order, have something white for white balance and some cloth to clean the lense. Most of these guys will later start to do camera work and never touch a mixer again. I see very rarely someone over 30 in this position and the few I see work as employees for our public broadcasters.
(I started out in this field and still sometimes work these jobs as winter can be rather empty of big productions.)