If you are after class 1, go with a trainer that has a set up that just puts trailer onto class 2 truck. Passed mine this way a good few years ago, was i feel easier and you are used to the same unit.
As has been said expect long hours, low pay (thanks to the migrant workers) and being treated like scum from everyone on the road.
Thank god im out of it, you could have my class 1 entitlement if you could. oh, nearly forgot get used to the phrase "just nip" as the boss will use it constantly.