Puppy crate training is easy especially if you begin training your puppy the day you bring him home.
Buy a crate big enough to allow puppy to lie down, stand and turn around inside it, but not so big she will be inclined to use it as her toilet (Dogs do not like to toilet in a small living space.)
If your puppy will grow to be a big dog, find a crate with a moveable divider. Otherwise, you'll need several crates from puppy to adulthood.
Put a washable pad or folded old towels in the bottom of the crate.
Puppies are naturally curious. If there's a crate in his long-term confinement area with the door open and a few pieces of kibble inside, your puppy will investigate it. Bet on it
Every time puppy investigates the inside of the crate even if only to put his head in, praise him and give him a treat.
If there's an especially tasty treat at the back of the crate and she goes inside to get it, do NOT close the door.
In the unlikely event that she ignores the crate entirely on day one, do nothing. Make a plan for day two to make the crate more interesting. Puppy training is a creative endeavour for you. Think like a puppy when you want to achieve something. For example: on day two, you and puppy are playing with a squeaky toy. Once she is really interested in the toy, toss it into the crate not too far inside the first time. Praise her when she retrieves it. The threshold of the crate has been crossed