It's true there's a lot of info out there. I guess it's up to you to decipher which best suits for your needs. As others mentioned, as living beings everyone's different and every dog is different...so it's part of the process to figure out which method works for you and your pup
Regardless though, as long as you do enough research, your efforts won't be wasted. It's more about having the patience to see it through. You'll see results eventually, as some learn faster than others!