Is this the first time you have ever trained a horse? May I ask how much time and experience you have with horses all around? I mean no insult, but you sound a bit new to all this. Is there any way you can call on a more experienced person to stand by you for the first few days and show you some moves, or at least watch you to see if there is anything you need to change.
I say this because you mentioned that one of the horses nearly ran you over. they can do that, but it sounded as if you were surprised by that and at a loss as to how to deal with it, and that is where your apparent lack of experience stands out a bit. I know this doesn't sound friendly, but it's not that easy to train a horse, especially if it's already been trained into some bad behaviors.