When people say “no skill" they do not literally mean absolutely no skill whatsoever. There has to be something you are a little knowledgeable about. And if the fields you are knowledgeable about don't spark an interest, then look at the activities you are passionate about.
Ask yourself two questions:
What am I passionate about?
What do I do during my free time?
These two questions will help you to identify an activity which you can use to provide paid services to people. Not convinced? Then you are not curious enough. I used to spend a lot of my time watching YouTube videos, one thing led to another and now I am learning about affiliate marketing while freelancing on Medium as well. Learn how to optimize your resources, even if it is just a hobby. Necessity is the mother of invention, keep that in mind.