I need a SEO/Social Media expert for advertising

We are a non-profit animal rescue organization who consistently rescue anywhere between 50-100 puppies & kittens every other week. We need help reaching members of the community and getting them to either donate or sign up to foster. Fostering is critical for our animals, as we can only rescue as many animals as we have fosters sign up for. We need help increasing our SEO for people looking to adopt a pet (increase adoptions), and reaching potential fosters for our organization. Our website is www.wtarescue.com and you can see how our process works. Our primary ways of reaching potential fosters and adopters is through facebook and instagram.