When doing keyword research, think about your overall goal. What would people be searching that are the most likely to pay for your product or services? That's where to start.
Neil Patel said, "Spend a little bit of time doing keyword research and competitive analysis because you don’t waste a year climbing to the top of Google only to find that the term you went after doesn’t drive any sales."
Additionally, if you are interested in sales internationally look for countries that have the most opportunity for revenue in your field, not just a lot of traffic.