You may have better luck connecting with horse people on the BACKYARD HERD site. Check at the bottom of your BYC screen to go there. Alot of helpful people there that could give you some quality advise.
I had some good friends that used to get wild horses at some auction. Ive seen them go thru the taming process, by putting them in a shoot and touching them. Definitely, they gelded them. They also used the shoot to get them used to having a bit and reins. Once that was complete, they would work them in a round pen with the bit and reins on. Back to the shoot to get used to having a saddle on. Not even sure if these are the right things , as Ive never owned horses, but it seemed to work for them.. Altho it took a long time gaining their trust with feed and treats.