There's no such thing as passive earning at the beginning you should first atleast know that in order to gain something there must be an equal sacrifice or effort to gain profit in this case it's the effort to learn and earn through crypto. Once you know the ways and methodology you can come up with a strategy to earn passively.
I think I didn't do a good job of explaining myself, when I said relatively "passive" I didn't mean a truly passive source of income but something that doesn't require a lot of time and pays accordingly.