Welcome to the site Eli. Hopefully I can answer some questions for you:
Definitely male then.
They're not social animals, despite what people think. They only come together to breed and that's it. So they live quite happily alone.
You cold feed them every day, but for adults it's generally best to feed every 2-4 days.
No, they are nocturnal and hide during the day. They don't require UV light.
It's fine to add a pond. He doesn't need it though, and he doesn't need a waterfall. Just mist the terrarium regularly to maintain a nice humidity.
My weakest area of knowledge is plant names. I usually recommend large aroids, like Pothos (sold at the store as Devil's Ivy sometimes). I'm sure there are folks here with more recommendations for you.
I never name my frogs so I'm not a good person to ask ;(.