Crate training is a process. Unless your puppy has been in a crate up to this point, it’s going to take some time. Cover the top of the crate to make it more den like.
We feed ours in there for the first few days, kept all toys in there, fed treats in there.
She had a mattress in there which was the base of her usual bed but it covered the whole of the bottom of her crate.
The crate should be big enough to go inside, turn around and lie out in, any bigger and you risk the pup toileting in it.
At bed time, take the pup to wherever you want them to toilet (puppy pads can take longer to potty train because you are allowing pup to toilet indoors). Once they have done, lots of praise and reward.
Put pup in the crate and shut the door and start using whichever phrase you are going to use to signal bedtime, we use time for bed.
We slept beside the crate for a couple of nights, so we could comfort her, and after that we gradually moved away until we weren’t in view at all.
Remember your pup will probably need to go out in the night, we didn’t speak or play at all at that time so as not to confuse her. Use your phrase again as you put them back in the crate.
We never put water in there, likely to be spilled or knocked over.
You could ask the breeder for something with mum or litter mates smell on to put in the crate, and something that smells of you.
Any children you have should be taught that the crate is the dogs safe place and they shouldn’t interrupt your dog while he is in there.
Toilet trying tip, use the phrase you are going to use to signal its potty time, we used “ go wee wee” and ours will pee on command now, which is useful on the nights it’s cold outside. Massive praise when they are successful with a high value treat, we used hot dogs. Take them out on waking, when playing and after eating. They usually circle and sniff before they go, so watch for that.
Lots of luck with your new baby!