I've found in the past that the more closely I identify with the heroine, the less completely she emerges as a person. So from the first novel I've been learning techniques to distance myself from the characters so that they are not me and I don't try to protect them in ways that aren't good for the story.
You should write, first of all, to please yourself. You shouldn't care a damn about anybody else at all. But writing can't be a way of life; the important part of writing is living. You have to live in such a way that your writing emerges from it.
Life clearly does more than adapt to the Earth. It changes the Earth to its own purposes. Evolution is a tightly coupled dance, with life and the material environment as partners. From the dance emerges the entity Gaia.
When the world throws you too much information, the only way you can stay sane or survive is to look for pattern recognition. Amidst all the blurs, is there a constellation that emerges, is there a straight line that's emerging?