Beginners! Need lots of advice please!!

That is a good point. I find (and others here have said) that the colour coding bears little relation to difficulty. Where I am going this afternoon (Nordkette / Seegrube, not normally used by tourists) there are a lot of runs marked with red diamonds, which apparently means 'not a proper piste' or something. Anyway I know from last year they are ridiculously steep, more so than black. But generally even with those normal piste marks, the colours don't seem to mean much, except as a very vague guide, and difficulty also varies with snow condition.