Hi!
Sure, we think that anyone can train a dog. It helps if you have an understanding of basic training skills like operant conditioning and behaviour modification ... doesn't hurt to understand a bit of dog psychology either - information about specific breeds and how dogs "think". But really, most of the time it's common sense work, being consistent, knowing yourself and your animal and having patience and the time to devote to the training. I think that if I were starting out that I'd want to have the support of an experienced trainer ... to teach me, not the dog ... how to go about certain things ... but once you've got the basic knowledge, whether you've read it in a book or learned it from a more experienced trainer ... yes, we think anyone can train a dog.
Take care: Hivin