I want to kind of make my home more comfy and inviting, and I think a koi pond could help make it look unique, too. What can you tell me to figure out if that's the right fit?
A koi pond would be a great way to accomplish that! They can be designed specifically to promote health and growth of the fish.
Is it hard to keep up with? Is it expensive? 
As long as you have a skimmer, water can be drawn from the surface and it will collect leaves, food, and other debris for you.
Gotcha, so it's just kind of like keeping up with a normal outside pool. So, do I have to stock it with specific fish? Expensive fish? Or is there anything else specific you can tell me about it?
Koi fish are distinguished by their color, but they are just a group of the Amur carp.
What's a fun fact about koi ponds, or koi, or what's something I should really know before getting into it?
The most popular type of Koi is the "Gosanke" koi
Sounds cool! Maybe I'll look more into getting them, then. I think it could be a good investment. Any lasting impressions you want to make before I go?
They were specifically bread for color mutations thousands of years ago. You will have plenty of beautiful colors and designs to choose from. Enjoy your pond!