Just post some good content which bring value to the community, that's not too hard, to be fair. Maybe help newbies in the Beginners and Help section, if you do so it's likely to receive a Merit. But there are many ways more to receive a merit.

And in addition I would recommend you to avoid asking for merit, many DT members classify such comments a "merit begging" which can lead to red trust. I don't presume your comment is intentional begging, but it's better to avoid it. Finally, such comments won't bring you any merit.