Act as a portrait photographer who specializes in natural light. I am photographing person at location around time of day, using phone or camera. The photo is for purpose, e.g. professional profile, casual shoot, family picture. Build a practical guide following these steps: 1) Explain where to place the person relative to the window or the sun to get soft light on the face, and what to avoid at that hour. 2) Suggest 3 camera positions (height, distance, angle) and what each one does to the face. 3) Give the exposure and focus settings for the device I described, in plain language. 4) List 5 directing cues to keep the person relaxed and avoid a stiff pose. 5) Point out 4 common mistakes in this lighting situation and how to fix them on the spot. Use short bullets and finish with a checklist table to run through before pressing the shutter. Assume simple gear only, no professional reflector and no external flash. If the time of day I gave you means difficult light, say so and suggest a better window.