I’m sorry to have to inform you that first ideas have already been taken.
Not that first ideas had ever been a good deal (except for maybe in the very early days).
First ideas are almost never the best ideas, in part because first ideas tend to be the obvious ideas. It’s very likely that if it’s your first idea then it’s other people’s first idea, too.
First ideas are what you get without digging deep.
Thanks to AI that means game over. AI will generate first ideas not only faster but better (as it can tap into all the first ideas that all the other people have previously given). Quite likely, AI’s first ideas will be much better than yours.
It’s the move beyond the first idea that remains hard. That’s where AI still needs guidance and where the will to dig deeper pays off most.
Digging deeper is where you can still make a difference.