Des,
like the lads have said, try it, if you feel you want/need. It can come later, sure it is important, but right now the last thing you need is more learning, so get some imaging done and shoot the darks/flats/bias frames if and when you need/want.
Perhaps let us know what software you will use to process with, as Marc says master frames (dark/flat/bias) are handy, but many packages allow you to point to the folder with all the frames in and it does the rest, masters are not mandatory.
Above all, keep trying and asking, I certainly am.
Gary
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