How to choose your first niche when every guide says something different
Three questions that cut the list down, and the one number you should ignore for the first month.
Start from a problem, not a subject
Niche lists are organised by subject: fitness, finance, pets, home. A subject is not something a person types into a search bar at eleven at night. A problem is. Why does my sourdough collapse is a problem; baking is a subject. Every page you publish later answers one problem, so the niche has to be chosen at the level of problems, not categories.
The three questions
One: is money already moving? Somebody has to be paying for a solution to this problem today, or you are early and the wait is longer than the method can absorb. Two: could you write twenty pages about it without researching a subject you have no interest in? Twenty is the realistic first batch, and pages you resent writing are pages that never get a second version. Three: can you picture one person you are writing for, whose week and budget you can describe? If the answer is everyone, no page will feel written for anyone.
Ignore search volume for the first month
Volume tools describe a market, not your chances inside it. A phrase with three thousand monthly searches and forty established pages is worse for a new site than a phrase with two hundred searches and three thin pages. In the first month you are looking for phrases where the current answers are vague, outdated, or written for someone more advanced than the person asking. Those are the pages you can win by being clearer.
When two niches look equally good
Pick the one where you can name three problems from memory. The other goes into a note, not into a folder of plans. A first attempt spread across two niches usually ends as two sites that each look abandoned, which is the outcome both niches were meant to avoid. The niche you did not pick is not lost: the pattern you learn on the first one is what makes the second one faster.
Choose the niche where money already moves, where you can name three real problems, and where you can picture the person reading. Then stop deciding.