Passive Income Strategy to learn and stick to

Tired of watching all these fake gurus selling courses and services, has anybody genuinely created a side hustle , which has enabled them to achieve time and financial freedom.

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There are so many different methods with everyone having an opinion (i.e dropshipping, Amazon, affiliate marketing, forex trading, etc.) If you could recommend one thing someone should be able to learn in 2023 and stick to that would produce results what would it be?

Note: I'm not looking for a get rich quick scheme I'm willing to put in the work just want to be introduced to a real path I can follow by someone who isn't trying to profit off me