To find origin of an idea or to create something original, you have to develop the ability to see.
Often we think that we don’t have skill to make something interesting and original. If look deeper and analyze why it’s happening, we tend to say that we don’t have original enough idea, idea worth to share with the world. It’s not true - what we in truth trying to create when we have a goal to create something interesting and original?
You only need one idea, one paragraph, one sentence to start. One detail to evolve your own idea from.
Repeating someone’s idea, product or rewriting an existing work - this is not creating, this is repeating. Copy-pasted ideas are not worth. Repeated ideas are not personal.
When you express an idea in a personal form, build some thoughts upon it, find connection with your experience - that’s where the true quality lies. It takes high amount of time and focus, but only this way insights are built.