In essence I ask Source a yes/no question. Shall I buy it?
I get a no answer more often than a yes. And then I ask some clarifying questions, one of them is: it is too advanced for me? More often than not the answer is yes.
Unless I have mastered, literally mastered the basics in that specific topic or discipline, Source will recommend that I don’t buy that course, tool, or book.
On Sundays I have a 90 minute call with a friend of mine. We have been doing this for 13 years, never missing a Sunday.
He is retired, works as a warehouse cleaning person.