Hi James. Really sad to hear you had such a s*** time because we all know how much this meant to you. Just remember "what doesn't kill you makes you stronger", next time you'll know the things to ask, sat nav, maps etc.
What about driving something smaller 'till you learn the politics of the job? We had a cement truck driver a while ago and he was rubbish, we were all but ready to reverse the damn truck for him, there must be opening for someone with a bit of skill who is prpared to make the effort.
Keep at it mate, you'll get there.