Considering I am your age now Baz and my first cycle of HST was early last year my advice would be similar to Tot's.
Focus on pushing more weight and eating enough to gain weight at a steady rate (1-2lb per week is around optimal)
Keep your first cycle pretty basic, then customise from there
Focus on pushing more weight and eating enough to gain weight at a steady rate (1-2lb per week is around optimal)
Keep your first cycle pretty basic, then customise from there