In the beginning everything seems not only impossible but utterly unfathomable. None of what you do around a horse makes sense, at first, because they don't think like us. So, you have to learn to think like something wants to eat you, prey, and not like the predator we are.
Once you start to get a tiny grip of that, then you have to learn to speak a whole 'nuther language. Eh, she's a cowy thing, a catty beast, ain't she? Where's that new latigo I bought last week? Who scratched up my tapaderos? Or, where's my numnah? I thought I left my jods here.
And then you have to learn farrier/vet speak and even more important, POO speak. Looks like he's got some seedy toe starting here. Hoof wall is separating, that white line disease can advance quickly. Oh dear, his canon bone is dropping, that's not good. He's got ringbone.....
You never stop learning! But along the way you pick up skills, knowledge and vocabulary, and somewhere along the line, they start asking YOU the questions and you realize you actually have answers, instead of in the beginning you're asking all the questions.
One day you're riding along and the horse spooks, tosses a buck and a rollback in there and at the end, not only did you stick, you realize that it was FUN! You discover that in spite of everything seeming to be so utterly confounding you have caught on.