Treat luring a 9 week old puppy 🐶

My puppy wants to bite every time I’m trying to lure with a treat in my palm held by my thumb. I see puppies online keep their snout in the palm on the hand as they move but mine does not. Or if he does follow my hand he gets bored and stops trying to follow. He might do it for a second and stop. Any advice on this? Also doing some research on YouTube to get different opinions. Other than this the puppy is doing awesome 😊 Thank you!