You're An Owner
Now that you've taken the plunge you are officially a Thoroughbred owner. In many ways you will get out of this endeavor what you put into it. Your partnership group should be providing updates with respect to training and races. However as an owner you should set up a virtual stable on one of the online sites such as Equibase or DRF and include your horse. You should also attend training in the mornings, especially breezes (your group should be able to provide target breeze dates in advance). You should also visit the barn and interact with your horse if that would be fun for you. In the end you are a part owner of the horse and it's up to you to take as much advantage of that as you can.