Cheapest method for making money online?

Hello everyone. I want the start learning how to make money online but I do not have much money to spend. I need you opinion which method(affiliate marketing, social media, Seo ... etc) need less money to start working?

What skills do you have?

Make an ogads account and start learning how it works, its not super difficult.
Now be creative and if you have an idea just start working on it just try, maybe you will fail maybe not, if so try again but better.
Just try to content lock as many things as you can, i have made over $1k this way in like 2 or 3 months without investing a single dollar.
just be creative and take action !

if you search on this forum, you will find free money methods