After that, the main thing you have to worry about is how you are going to get the traffic to your website.
The first thing that should strike you from this list of keywords is high keyword difficulty on the most searched keywords (dating sites, dating apps, dating websites).There are two ways that you can read this.
Given this fact, there is fierce competition from dating sites and apps to get their hands on this money. Affiliate marketing boils down to two things: If you are promoting the products that are most popular, it makes sense that those are the ones that people want to buy.
Branded keywords are a great place to start with any industry as the allow you to understand the big players in that market.
There is a great table where the review is summarized simply and clearly.