Please help, I have received my pi and really excited about getting going but having problems with debian, I have tried down from RS site but this was very confusing, then tryed downloading from element 14, this seemed a lot easier (maybe to easy) would I need to remove everything off the sd card first so nothing appears on it, i have downloaded it which taken maybe half hour then put the two files onto the card, nothing happens at all when I plugged it in though, just red light, I connected with HDMI into tv. I am a complete beginner, please help