Can somebody help me with the new puppy?

First time puppy owner. Today he was on a 10hr flight and I got him around 4pm. Flight nanny told me he refuse eat drink nor potty. At home I prepared a play pen and inside the pen the fresh patch (grass) and his crate with beds and toy.

First thing he arrived I put him on the grass, he didn’t pee on it but instead on the floor, that’s ok so I cleaned it. From what googling and GPT told me he needs to rest so I gave him .5 cup of food and water and put him in the crate to nap.

He was half sleep half wake as if I move he wakes up so every 40mins I’d go up and put him on grass try to train him to use that, if not back to crate for rest.

I do play with him a bit inside the playpen like holding him etc. after the attempted potty session. (Fresh patch is right next to his crate) right now he seems to use the grass as play area like he would lay on it.

This been kept going for the last 5 hour. I asked breeder what I am suppose to do breeder told him to not keep him in the playpen let him roam around give him love and care, if he pees just tell him no and clean it and put him on the grass, which is not what google been telling me.

The other thing is if I disappear he barks like a lot. Which is normal?

So question is, for tonight, what do I do? I don’t want him to pee in the crate (his bed), so do I just leave the crate door open and let him out in the play pen? I mean grass is right there but I think he would pee on the floor instead of grass given he seem to think that’s play area.

Also breeder told me I am doing it wrong he is very upset, which tbh yea pup does look bit upset he barks a lot if he doesn’t see me. GPT told me to ignore the bark.

So what am I suppose to do??? Just leave the crate door open and let him move in play pen? If he pees I clean up? Or listen to breeder let him free roam and sleep with him tonight?

I am ok with cleaning up accidents but I want to do it correctly.