If you could just pick $10 keywords, everyone would be doing it. I see a click over $10 only every couple of months. Only one of my sites is in a higher-paying niche.
You need to design the site properly and target the keywords in the right manner.... Also, if you target on one such keyword, probably you may earn very less. Target more number of keywords which are also relevant, then you can earn more money
Have the right keywords, do research before writing about the keywords. Keep in mind the keyword density and how effective it is in your articles.