Congratulations on your store. The key is marketing your store and sticking with it for at least 2 years. I used to suggest SEO, but in these times, with the changes in Google, you need to hire a professional firm to help guarantee measurable results. You can do PPC too yourself, just make sure you have a good budget.
I would also expand on your logo. That is what is going to set your store apart from the other shops selling the same thing. I would make it bigger and fancier. Maybe even hire a pro (or a high school or college student/almost pro). I would also set up a blog and update it at least twice a week. It can be about random stuff, like your dog and your life. Use it to give you and your site a personality.