There are a lots of user who started with 0 and already ranked up to full member, sr member. Ddmrddmr even got 1000+ merits from 0. Therefore, it's nothing so hard to find what kinds of posts deserve to get merit.
The very first thing-
Act like a normal user, not a merit hunter. If you think about merit, you are not gonna have it. Browse the forum for which it has been made of and merit will easily come to you.

Checked your post history. Got 3 in English where you only have talked about merit. Again, I want you to remember the previous line- " Act as a normal user, not a merit hunter."