For me it is best choice to join bounty or signature campaign because for this we will not have to spend our money but we will be able get money, we can earn for free here, it is good to start trading as well but for trading before starting it is good to gain knowledge as much as possible, investing is also a good option in this regard.
Always remember that time is even more precious than money. I also like doing signature campaigns but I already spend the same amount of time online in the forums,,, I do learn a lot from what I read and by also trying to contribute I gain more understanding of the industry. And so I see that carrying a signature just helps to compensate me for that time. But if you spend hours doing bounties and searching for them, forget it,,, better use those hours to learn or do an actual job.