Sammy you need to get a rope halter with about 6ft of lead. You need to desensitize her. slowly start taking the ends of the lead and rub her and let it hit her on the neck back legs feet and head (Not beat or slap hard just kinda throw it up there on her. keep doing this until she quits shaking or moving, if she wants to back up and move on you keep it up and when she stops let off the pressure and reward her with a rub on head never pat the horse they see that as the same as slapping with a rope...Do this daily until you can halter her and do this with no reaction, if she still want stand still hobble her then she has no choice, also when done with that take a bag on end of pole and start shaking that all around her and rubbing her with it the same way until she doesn't move this is called desensitizing....will help greatly when you ride
You need a LOT longer than a 6' lead for that. And you need to know about body language and proper handling before attempting such "desensitizing"... A novice with a scared horse can easily get themselves or the horse hurt throwing a rope around and hobbling a horse. You have to TEACH a horse to hobble, you can't just slap them on most horses... You'll end up with a train wreck.