As many of the members mentioned above, joining a bounty campaign and airdrop is a good choice if you don't want to put funds for investment. But there are some things that TS needs to know, join bounty campaigns and airdrop also has risks, especially now that many projects are a scam.
Understand your abilities, then choose the campaign that best suits your ability, it will facilitate and make you more enthusiastic about doing it. You also need to know that forum rank, number of followers and the like greatly affect the reward you will get. You must pay attention to the commitment to work on the rules properly.
Nothing is easy, everything takes effort, and there are risks involved. What is clear, you can learn about many things, try ... if it fails then evaluate what is wrong, then try again with the new strategies and abilities you have.

This is also a very effective alternative to maximizing your potential. Many job provider websites offer salary offerings in BTC