Two of his post titles are questions somebody clearly asked him in an unfriendly tone, and he answers both without dodging. Is it certain to work. No. Has it made him wealthy. Also no. Paul Wakefield built the whole blog around being the person who declines to oversell, which in this corner of the internet is unusual enough to count for something.
The teaching starts from nothing. What internet marketing actually involves, whether you need a degree for it, what list building means before anybody has a list. He is clear that search optimisation on its own stopped being sufficient, and says what has to sit beside it now.
His goal posts insist on time frames and on keeping a target modest enough that missing it will not sour you on the entire idea.
Start with the introductory pieces. He wrote them precisely for the person who has not begun yet.