Hello! Been playing maybe 5 months, working my way through the Beginner sections...

Should I be mastering each piece, e.g. arpeggios, before moving on? I mean, I know I'm not "mastering" anything at this early stage, but be "fairly proficient with"?"
Or is the intro series simply designed to give the player a small sample of skills that will be explored in greater detail further down the line?

Thanks in advance.