This is one of the best bits of advice I have seen for newbies “If you don’t have any issues, then don’t calibrate”, I remember watching all the YouTube things when I first got my Mk3, they all had so many ‘tweaks’ that I thought I must be getting it wrong, let me get it better from what I have.
Now I am still not and never will be an expert but looking back the machine was the same but looking at the environment it was in, was why some ‘tweaks’ worked only for them.