They're a site I stumbled across by chance and finally feel ready to submit something. No experience with publishing, much less online publishing through a website. Just curious if anyone has submitted to them and if the experience has been good, bad, or meh.
This. You might not feel as though your story is worth money, but if nothing else, it's worth starting at the top.
Yes, what others have said. Research markets that seem to be right for your story...and then go for the best paying first and work your way 'down'. In addition to the pay, the better paying markets generally have more readers, which would mean more eyes and readers potentially enjoying what you've written. See, what if you send it off to hellohorror and they accept it right away? Might you not wonder if it was good enough for a market with more exposure? Yes, going with bigger/better paying markets means more/stiffer competition, often with established writers, but what's the worst that can happen? Your story is rejected? It happens, even to established writers. It's part of the business. Good luck!