Check with McNatt Farms, they have a website. Even, if they do not have one at this time they know a lot of people and may be able to help. Bobby is the Father and Wendall the son. Really great and helpful.
You are very smart to start off with looking for a deadbroke trail horse as your first. No amount of money is too much for your safety and enjoyment. There are too many people out there that buy pretty or buy cheap and they always regret it. Good Luck!
My neighbor has a very gentle well broke gelding for sale that would be perfect for a beginner adult. He is 15.1 hands and 7 years old. Chestnut with a flaxen mane and tail. I took him for a 2 hour ride yesterday to see who he would be suitable for and he was perfect. He wants $750. for him. email me if that sounds interesting and I can get you pictures. firstname.lastname@example.org