How can I properly care for a 2-week-old long-haired kitten?

To properly care for a 2-week-old long-haired kitten, you should provide a warm and safe environment, feed them kitten milk replacer every 2-3 hours, stimulate them to urinate and defecate after each feeding, keep them clean by gently wiping with a damp cloth, and monitor their health closely for any signs of illness. It is also important to consult a veterinarian for guidance on proper care and nutrition for such a young kitten.