Ad 2. Don’t worry…there is no correct! Theoretically you could calibrate your monitor (buying a colorimeter), but even then, the colors on your monitor depends on the lighting in your room and therefore vary during the day…and even if you’d get the perfect calibration, everybody else will see it differently on thee own monitors…If you can make it look good on both screens, you are probably safe.
Looking good already! Have fun sculpting 🙂