Is it even possible?
It isn’t hard to make the argument that everything is stolen or borrowed, that there isn’t an original idea to be had. There were only so many first ideas, and now we’re all just stealing and borrowing.
Because of my limited knowledge I can’t say this with certainty. But it certainly seems to be true.
The question, then, is not whether or not you borrow or steal, but what you do with what you borrow or steal. If all you worry about is originality you will likely fall prey to paralysis by analysis. You will always find someone doing what you want to do or creating something you want to create.
Try instead to focus on what you would do with this or that idea. How would you apply it? How could you mix it, combine it, toss it together with another idea or concept? Perhaps the idea isn’t new at all but nobody has succeeded at doing anything useful or productive or beautiful with it.
These are the questions you should truly ask. And who knows, you might find yourself being original.