write first
A little birdy told me, "You can write yourself out of a bad concept better than you can conceptualize yourself out of bad or no writing."
Writing regularly improves writing, but conceptualizing or reading about writing refines ideas. However, the latter says nothing of your ideas' originality, if that even matters.
Concepts are abundant yet common. Every concept has been explored before. Showcasing unexplored concepts is impossible because you can't prove a negative, I'm not omniscient, and doing so would explore them anyway.
We can work more efficiently. Focus on rewriting working tropes, plots, and stories in your unique style. Learn the rules now so you understand how to break them later. It's how you execute a concept that matters. It's also what makes your writing your own.
Creatives often equate copying as stealing, but they aren't alike. Copying leaves the original object alone. Stealing takes the original object. Internet rabbit holes like Wikipedia and TV Tropes show how interconnected creative works are. Instead of worrying about stealing, consider the benefits of inspiration and copying from both the giving and receiving end.
You can push through a blank page. Techniques like free writing, writing without judgment, and writing gibberish help break cycles of paralysis and inner criticism. You can push through bad writing all the same. Small, consistent improvements will get you further than hoping for a huge leap. The smarter the goal, the more maintainable your momentum will be.
Written words can receive responsive feedback that a lack of words cannot. Swallowing your pride and accepting constructive criticism can benefit not only your work, but also your camaraderie with others.
Don't let the perfect be the enemy of the good. Setting up and sticking to maintainable systems, which target exactly what you want, will get you there.