The information provided by Quirk is good. What I like the most is the way the information is presented, step-by-step. And some of the recommended readings/books are useful too.
I would love for this to be even more geared toward solopreneurs, there´s a lot of emphasis on "company culture" and "colleagues" which does not apply to a small business or solopreneur.
But it doesn´t take much to interpret what´s been said and apply it to my own business.

The best $3 I have invested, this is 5 tacos from me.