How do I get 8 week old puppy to pee outside?

I’m taking him out every 45 minutes, we sit in the desired pee spot for 10 minutes, he chews grass and chases lizards and doesn’t go, and then we come back inside and I put him in his playpen, and 5 mins later there’s pee on the pee pad. Should I remove the pee pad? Should I maybe get a grass pad instead to teach him to associate grass with pee? What are the “need to potty” cues? I got him 24 hours ago and he hasn’t gone outside once.