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babs_a_lot - I would recommend you watch the videos ==>>
Video Tutorials. As a general rule I don't like "How to blah-blah…" videos they take to long to get to the point, but these are an exception.
Watch a segment, pause, go into calibre and practice what you just watched - if you don't 'get it', rewind and repeat before watching next segment. IIRC it took me an hour or more to get through the Grand Tour.
BR