I have to agree, the flight sims are fine for practising instrument flying.
But when you start your PPL you will need to forget bad habits which the
sims give you. You MUST look all around you and outside the cockpit. Do not
get fixated on the instruments. Enjoy being in the air, enjoy making
yourself frightened in steep turns and hitting your own slipstream. It is a
different way of life.
Come back to the sims later for certain bits of practise.