Continental Kennel Club is CKC. AKC is more particular about things than CKC and people are more familiar with them. For instance AKC will come to your home to inspect and check records and conditions. I dont' think CKC does anything like that. Were it me I would hold out for an AKC dog. So it's not that you won't necessarily be able to sell the pups, but people who are familiar may hold out for AKC reg. As for breeding....I think you have gotten good advice in the posts so far. I would just make really really sure that it's something you are willing to commit to. For instance if the pups don't sell would you be able to provide a home for them too? Once you have them they are your responsibility forever. My mom bred AKC miniature schnauzers for about 25-30 years. Even with that much experience there are always new things to learn and tons to do. Ane the vet bills are ungodly IF everything goes by the book. She was home all the time and worked every minute of it. It can be really rewarding, but it's also pretty heartbreaking. My sisters and I used to bawl everytime she sold a puppy. If it was one we really liked we would try to get the people to leave before they bought it by being really annoying.
And heaven forbid you lose a puppy. Some of them don't make it and that is just dreadful. It's wonderful when that pup you have been bottle feeding every couple of hours makes it....but when they don't...well, you get the drift. Good luck with whatever you decide!