Sorry Get up and Go I hit the send button before we went into option 3. You should participate in your local shows. There's probably 4-H shows and maybe some local schooling shows near you? The entry fees for these local shows are usually only about $5- $9 a class. That's what they are here California and we've got to be one of the most expensive states in the union when it comes to the cost of living, sheesh!
Ground exercises??? Do you mean for teaching your horse to set up? There's probably some really good videos on You Tube. How I started with my horse, was to first teach her to set her back legs and then set her front legs. When you are moving your horses legs, you want to practice going from really using a lot of pressure on the lead to as little as possible to move that leg. You also need to look at the leg you want moved and where you want it to go. You need to be firm but soft at the same time. Now, when I come to a stop and turn and face back looking at my horse (along the length of her body to her back end), she automatically set's her back legs and I may have to just move one front leg a smidgeon. This did not occurr overnight for me and my horse. My trainer says, she and I are like two little kids in the back seat of a car on a long drive. "she's looking at me, she touched me, she's looking out my window!" You get the idea. Sometimes I have to step-a-way from the horse.
Ground exercises for getting them in shape? First and most important I think is to make sure your horse is carrying himself properly. Not going below the vertical and not letting them carry their head to high. You want them to round up and lift their tummy into their back bone. It's hard to give proper advice without being present. Because it also needs to incorporate you using your body correctly and your hands. You really need someone knowledgeable and there to help, I think. But maybe one of the other posters on here can work you through it.