I'm not really dicking around with gas. I'm looking for advice on how to order parts for a fireplace. I'm not going to pay someone to tell me what kind of fireplace I need to buy when someone on reddit can point me in the right direction. If it's more complicated than that, you should tell me why, otherwise I will just be guessing at what I'm doing. That is much more likely to cause the outcome you are concerned about.

I do have non-zero experience. Regardless I'm not really asking for advice on how to work with gas. I'm asking for an idea of what I need to be looking for to get this fireplace running. Even if I hire a plumber (and I probably will), I will still have to buy a fireplace set, and I have no idea what to buy, or even begin to look at prices, or anything.