Go to a club where all these types of dogs are working. See what you like, what you don't like. It's really hard to tell you what breed is better because everyone looks for something different in a working dog. It's also hard to say what dog will work better because its not just about the breed, its all about that particular dog.
Every breed brings something different to the game. You have set your expectations really high for a first time handler who hasn't even titled/trained in any other sport as a stepping stone so that you'd understand a little more of what it takes to title a dog.
If you're really set on titling, I highly suggest visiting as many clubs as possible and seeing dogs work. Meeting breeders and handlers who can point you in the right direction. I wouldn't make assumptions based on what you've read on the internet, and what you think your experience has led you to believe.