There are no secrets, and the people selling you pieces of one are counting on you never assembling them. Christina Crews spent years hunting for the right information before arriving at that, and it is the position the whole blog argues from: educate yourself, because nobody hands over a shortcut they could sell you instead.
Her keyword research post follows through on it. She uses the free tool, admits no tool is ever exactly right, and points out that close enough beats the guessing most people are actually doing. That describes the work more honestly than most training bothers to.
She writes about Montana as well, where she was born, and about the questions people ask once they find out. Somebody once wanted to know whether they had ice water there and rode horses everywhere. She tells it better than any of the marketing material and it is considerably funnier.
If you have bought several courses and still cannot say what to do on Monday morning, read the marketing post and then the keyword one.