I Need Help Finding Myself...?

I'm 17 years old and I've failed 3 times leaving me very far behind. I used to do things I regret and I very quickly realized that this wasn't the life for me. I'm struggling to finish school because the one thing I want more than anything is to make my mother proud and graduate high school. Yet, I have a hard time concentrating when a million and one things are running through my mind. I always think about my future and how life will be and I don't want to live in poverty as I do today. I'm sick of it and I'm scared that I may never be successful because I have no talents. I can't play an instrument, I'm not head cheerleader, I'm not in the math club. I feel like I'm a nobody and that I have no purpose on this earth but to fail at things. The only thing that I love more than anything is animals (mainly dogs) and cooking. I enjoy being around animals, watching dogs play is like being in paradise. I'm very good at reading dog body language and training dogs. My Golden Retriever Roscoe is almost perfect at my home agility course. I also love to cook, when I'm alone and bored, I love to resort to cooking. There iss nothing better than eating something that you have created yourself. I'm not sure what career possibilites I can choose when I only have 2 main interests. I would never resort to doing something I don't love to do so does anyone have and career possibilities. Veteranarian is out of the question because I have a weak stomach when it comes to animal blood.