I wanted to join signature campaigns that badly, but I guess I should start from the bottom, where I can learn the basics, how will it work, what to do, etc. 
Btw, thanks for this thread, I guess this will help others who has the knowledge but can't get merits
To get merits, you need several important things, including knowledge (which you can learn), skills (which you should learn, practice to sharpen your skills Btw, thanks for this thread, I guess this will help others who has the knowledge but can't get merits , in particular how to use forum functions, search, etc. and English writing skill), experience (which you can get by spending more time in the forum and in the crypto world); and positive attitude (which will get you positive viewpoint about merit system, that in turn will make you readily to help others in the forum).