Unfortunately, you were not eligible yet to participate from signature right now. Growing your rank through creating a valuable post and earn merit should be prioritized. Contribute and have constructive discussions with other members then you will certainly receive merit for your growth. If you want to earn so badly, then if you have some skill like programming, designing and such you can sell it on service board.
You can participate in a bounty campaign since a few of them accept a newbie but I don't think it would be profitable because it is very hard to find a promising campaign, the fact that most of them are scams.