. . . and the time, and the ideas, and so on and so on; not the talent and the time and the ideas and so on you WISH you had.
Don Rumsfeld was onto something. And we know how that worked out.
Well. . . maybe a bad example. Forget I said that.
What does E.B. White think?
As usual, the answer is to just get started. Put something down on paper. You can fix it in various redrafts.
And there will be redrafts.