I would agree that Warwick Schiller is a good person to watch. I also enjoy Julie Goodnight, but I think she has less free stuff to watch.
Mark Rashid's books are very entertaining. I do not know your actual hands on experience level. Some of these books and videos can be somewhat 'esoteric', so if you don't have a basis of actual , physical real world experience, it might be a bit hard to relate to.
When I first started riding, I read a ton of stuff. A lot of stuff abotu dressage, oritinally, because that was my first area of interest. When someone recommended I read "True Horsemanship Through Feel", I was very confused by it. Over the years, as I learned more, it confused me less. Still, much of it is too hard for a person whithout years of actual expeiernce training to really understand . . because the concepts are so apparently simple. But, they are actually profound, you just can't see it until you can.
See, I sound totally like a woo-woo nutcase. I assure you, I am not.