In order to earn merits, you should have several things:
1. English skills for reading and writing.
2. Knowledge about crypto (its ecosystem, its market, its hot trend, etc.), which you can get by reading
3. Experience, which you can get by spending more time in crypto world and in the forum.
4. Skills for efficiently using the forum.

And something more. Mixing all those stuffs, you should try composing high quality, constructive posts to contribute to the forum and help other users.