Another bad day

went to the venupuncture course today which was fairly awful really and only got to practise on a plastic arm for a couple of goes and that was that, I'm now able to be let loose on the public and can take blood under supervision for the first ten unlucky people and then I can get signed of as being competent, outrageous don't you think so? I have no confidence in my ability to do the job properly and safely, I think I am going to have to quit the job as taking bloods is what is in my job description and if I can't do that then I can't do my job can I?