Mmmmmmmmmm.

No, I do not "follow" Jan Fennel. I have read her books and happen to agree with a lot of what she says although I was using my methods long before she published hers. The main part of what she says is that this method/theory is something she thought up - it isn't. She came up with the same thoughts and theories through the same methods of study and observation that a great many behavioural scientists before her, with her and after her have. It is not a new theory or behavioural program and I certainly did not adopt my philosophy from her. She does, however, have a gift for putting the behaviourist language into laymans terms. This does have the disadvatage that many people do not truly understand the principle behind the theory and only get the basics and find it very hard to put it into practice without demonstration or support.
I suggest you read the books you have and make up your own mind on behavioural theory, find a technique that works for you, which is usually an individual style for every dog, and I would encourage you to develop your interest as far as you can - you obviously have an interest and passion that you could push into a career. Psychology, behaviour, phsysiology, developmental sciences - be it canine, other animal or human will be fascinating for you.
Please be aware that your greatest source of information, in any field, is the network of people you make contact with through your research and contributations to the field. Even if somebody's theory is something you disagree with, it is still valuable as it gives you an opportunity to try and strenghten your own through trials.