It's hard to understand where to get merits. I'm not after with the merits though. Maybe doing efforts to help people make money here in bitcointalk could consider be a merit
It is hard to understand how can someone read the first post and don't understand after that how to get merit.
A simple answer : make useful and good quality posts.
More info
https://m.imgur.com/a/jWrTB, you could get more informations from the infographics in the OP.