1. Knowledge First:
This is foundational. If you don't have this you are liable to fall to scam. You need to learn about wallet, exchanges, dexes, and conviction and patience.
This is the problem we keep having all the time. "Someone reached out to me and demanded that I trade her funds on my account, with a monthly or weekly return of interest split in half.. all I told her was that she's lucky she discussed it with the right person that'd advise her; my advice was that she shouldn't dare to trade without having the knowledge on her own
You aswell was on the right part as you never accepted the offer, she must have heard a lot of cooked stories on how huge profits are made without understanding that the market trading might go side ways which means losing funds other than making profits, since she has no knowledge you will be falsely blamed for misused of funds giving to you for trading. Among everything listed by OP, the most beneficial would be to gain knowledge and also knowing how to interpret the knowledge into skills and actions which will in turn yield profits.
3. Airdrop Farming:
This is a low risk way to make money in crypto. Learn the popular airdrop in crypto space. Currently Telegram mini app farming is what is reigning.
I'm afraid I'll have to disagree with this statement.. Telegram "play to earn" games aren't paying shit. Following airdrops is like scalping - nothing controls their listing process... It takes years to happen and mostimes, doesn't even happen.
Just few out of hundreds pay in good profits, it is not the most reliable way to earn profits so it would be unthoughtful depending on Airdrops farming. Anyone who is involved in the farming should have in mind that it is of greater possibility not paying than getting payed.