INVESTING IN STOCKS AND CRYPTO it is the easiest way to make any passive income, if you have any saving you can start buying some INDEX or HOLD some crypto but this method has its own risks and you better do a little bit of research before getting into investing in any kind.
STARTING A PODCAST it is fairy easy to start you need a mic and a laptop to make it. it is challenging to grow your fanbase but it worth the effort.
BECOMING AN AFFILIATE MARKETER this means you are selling other people`s product but you are getting a percentage of the sale. you can sell these products off of your website or YouTube channel or any where you want.
SELLING A DIGITAL PRODUCT you can create an NFT or write a book or make an educational package and teach other people your skills.