To be honest, bounties and airdrops are a waste of time unless you're lucky enough to obtain a very nice one, which can be difficult to come by, that is why I don't do airdrops.
If you want to earn money online, the best way is to learn a skill. For example, you could use "Coursera" and you wouldn't have to pay a single penny to learn them because it has a feature that allows you to apply for financial aid. I have used it myself to complete several courses, but you can also do it yourself if you dedicate your time and attention to it.
And once you start to get a hang of the skill you're learning, you can start applying for jobs or doing volunteer work to build your portfolio and also get some experience on how the entire ecosystem works -- you should also keep in mind that it will take consistency before you'll be able to get what you want, don't keep the mindset that you can accomplish everything overnight, it'll be a step by step process. I don’t know your age but from the way you made your post I believe you’re still very young, so there’s still time for you to get one skill for yourself.
Most bounty and airdrops in this era can be said to be a waste of time, but not all airdrops in this era are a waste of time because it's not like it used to be that you just join and you have rewards to receive. The current style of those doing airdrops is that you first use their platform for a few months and do an activity on it. Then, all of a sudden, they will have a program of airdrops for qualifiers who just use their platform and trust to enter funds here.
As for the bounty, maybe it's possible to say that it's really just luck. Because if the managers who hold it are reputable, the rewards you will get are not that big. It was really only in 2017 that there were large-scale rewards in the bounty, to be honest, but this time I have not seen or heard anything like what happened in 2017.