Hi Missy_H, we are in a very similar situation and unfortunately I do not know how you could solve your conflicts with your parents. I have tried to make mine understand that what is going on with me is not laziness or a personality defect but I gave up. I think when you have depression your energy is already so limited that you should conserve it for things that are worth it, don't waste your energy on trying to convince your parents. You are there to get better and although the situation is less then optimal, you have to try to do what you can with the things available to you. You could start very small but do the things you propose yourself to do religiously and with the time increase the difficulty level. For instance, you could force yourself out of the house everyday for a quick walk, or do exercises for 5-10 mins a day.
You mentioned you live in a rural area. I'm thinking you could look around and see if someone needs a dog sitter for instance..that way you would have to force yourself to get outside and get some fresh air and relaxation time with a dog. Or another thing you could try out is volunteer in your community. Even if you aren't religious, you could still go to the local church just to be around people and get into a more calm state of mind. The church often has free counseling services you could benefit from. Again, it might not be your thing but I think it's helpful just to get out of the situation going on at home. Other than that you can post here and get in touch with other depression sufferers. You could try online counseling and profit from other online depression resources. If you need to talk to someone, don't hesitate to pm me. I hope things get better for you