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."
Well user like Ddmrddmr has an exceptional skills in posting here in the forum. There is no doubt about it and that prove already when Ddmrddmr has reached more 1000 merits for a legendary rank merit requirement. He is already a legend.
Anyway, getting merit may hard for when you do a quality post reviewing it all the time should be done before posting it. I bet you can meet many users here that has expertise and will scrutinize your post (base on my experience).
For now, since you are new on this forum it might be good to participate in discussions and just do not mind gaining merit for it will come in the right time. Just cling to the forum and be patient until a merit source will acknowledge you in your posting skill. Some of the merit source will consider meriting post even if your english looks bad as long as they will get your point, all of your activity are not spam, and you have dedication and time to learn in this forum.