Merit is not very easy to achieve, if you have aptitude then you can definitely achieve merit. If you can provide any good information in the forum which will be useful to the forum and give good reply then you will get merit as your merit. However, I can say that there are several ways, such as participating in Bitcoin Pizza or Bitcoin Pie contests, where you can earn some merit by showing your skills. By visiting different threads you can see where different contests or challenges are running and if you can complete the achievements you will get merit from there. However you should practice reading a lot and from there you will understand how to qualify.