Brahman cattle can be a little tougher to break. I used to work for a guy and we broke twenty in a month and a half. We always used Johnson halters while breaking. The halter stays on 24/7 until their broke. We would run them into a small trap and take a show stick and hook their halter to put a lead on it. We would tie them first thing in the morning after they were done eating, and leave them tied low all day until time to feed. The main thing is messing with them. Always walk them into their pen and make them stop before letting them go. The worst thing you can do is let one go. Especially a brahman; their smart and will learn they can get away. What I would suggest is walking her a lot. Walk her until she tries to break away from you. Stay about a foot off the halter and stay on your toes. The moment you feel her try to break, drop back on the rope and get her head turned. If you let her get her head down it's over, but if you get it turned she'll swing her body around and stop. Keep doing this over and over at home. She'll realize she can't get away and she'll quit trying to. Just be careful because if you let her get away multiple while trying this it's just gonna make it worse.