Then halter her every day, multiple times a day. Sometimes have ayreat ready, sometimes don't. Have a brush handy to groom her and find her favorite scratchy spot. You don't want to he poking and prodding or trying to get milk. Just leave those areas alone unless you are gently brushing but I would suggest brushing over the back and down the ribs until she starts to accept you ard the boss and she can trust you. If she is giving you the eyeball with intent to nip having an elbow ready for her to run into can persuade her that you aren't worth the trouble. Work her if you are comfortable working horses. Ride her if she's been trained and is broke to ride. I'm not saying ride her into tud ground but we've ridden or worked ours until they are just too uncomfortable. Considering the heat it would need to be early or late and until you have an idea of her fitness level keep if light.
Some horse people change their horse, they change their tack and discipline, they change their instructor; they never change themselves.