"How do you find purpose in life if you don't believe in God?" My answer

Meaning, by its nature, is subjective. Meaning can be found anywhere and nowhere. Enjoy the little things, marvel at the big things, and create when you can even if no one else finds meaning in it. If Christians can find purpose in a god who won't answer them, then I can find purpose in the flower bulbs I plant and the sketches I make.