All great advice!
When reaching out to breeders, be concise and succinct with your message. What is your history with dogs, what is your family situation, how/where will your dog be raised, what training/competition do you think you'll be doing, do you have a specific want in your puppy (red female, etc.). Breeders are busy and have a lot of BS to sort through. If you can make yourself standout by sounding responsible without rambling, you have a better chance of getting a response, IMO; someone correct me if I'm wrong! I would say don't immediately discuss price but expect to pay upwards of $2000+, depending on your area.
When I started looking, I reached out to maybe 10 breeders across the Eastern half of the US, heard back from maybe 3-4, and it happened to work out with 1. And yes, if you start reaching out now, you may be put on a waitlist. This is WORTH it.
If you're on instagram, @doseofdex is a great account that posts a fair amount of great information about reputable breeders and what to look for. I'm sure there are others but she sticks out in my mind because she doesn't take flack from anyone.
Their breeder has some excellent resources on their
website.
Also, be prepared to do regular holter tests and echocardiograms because DCM is a b*tch.