To care for a pet turtle, you will need to provide a suitable habitat with a basking area, UVB light, heat lamp, and clean water. Feed your turtle a balanced diet of commercial turtle pellets, leafy greens, and occasional treats like live insects or small fish. Regularly clean the habitat, monitor the temperature and humidity levels, and take your turtle to a veterinarian experienced with reptiles for check-ups. Additionally, provide opportunities for your turtle to exercise and explore outside of its enclosure for mental stimulation.