Interesting as it is, getting back to the original question..
Some very good advice given, particularly about not lazing around and talking or texting on mobiles. Winds people up seeing lads spending most of their time doing that.
Also, learn to take a joke, because believe me you will be the butt of them many a time.
Also try not to get too lippy.
One other thing, when you get to do a bit of conduit work, try not to start grunting and puffing the minute you have to put a bit of effort into it and complain that your arms/ back/ wrists ache after only five minutes work.
Other than that you'll be fine I'm sure. Someone in management has decided you deserve the chance so prove them right.