Kudos to you for taking active role in your horses hoof trimming. I am not sure where you are located, but i highly recommend Ida Hammer for learning about trimming your own horse. Her website is https://mackinawdells2.com/index.html
many of the trainings and information are online and i believe you can order "model hoofs" to practice on. I am attending her 3 day workshop for the 3rd time here in Michigan in a couple weeks. I took her trainings twice and this is my 3rd. I always learn something new and good to get refresher. I have been trimming my mare for a couple years after not getting good results from farrier.
Mary Marzec, Chelsea MI, 2012
Mary/Katie Case HIstory