Resources for creators/inventors to learn about passive income.

Recently I got interested in passive income.
I was excited by the idea that as I create new inventions, I can also start sowing seeds of passive income that make life easy and accelerate the journey towards freedom.

I found the below blogs that help for passive income: 

Other sources that give overall good life advice indirectly leading to passive income:
hacker news
infinite waters diving deep channel on youtube
teal swan channel on youtube
paulgraham essays.
dereksivers blog
benjamin hardy blog
tim ferris books.
robert kiyosaki from rich dad poor dad
arfeen khan on youtube for peak performance tips.
anthony robbins
bo eason on youtube

sadguru from isha foundation on spirituality
baba ramdev youtube channel on excercises and cures.