Hi,
I’ve been approaching a few companies already regarding work, and had a couple say “call us” and one “come and see us for a try-out” (that’s on-the-job, not assessment drive). 
They know I’m a total newbie who has yet to even start training.
Anything I should ask/look out for/know before going forwards? Anything contractually to look for?
Nothing like the deep-end! 