It's been my experience that almost everything is like this. You decide one day to learn how to do x, and look up some information from what seem like trustworthy sources on how to do x well. What you'll need, the technique involved, the time, the danger points to watch for. You do everything according to what you've been told. And somewhere between 15% and 20% of the time it goes to shit because the source you trusted was either a moron or a liar. I just factor it into my expected time-table now that part of learning any new thing will be burning through untrustworthy sources until I find one that isn't full of shit.

This can be somewhat ameliorated by cross-referencing several sources, and the internet makes this easier, especially Youtube. But it's still infuriating, especially when time and money are limited.