Beta fish (freshwater/saltwater capable)

I have just bought all this brand new equipment and fish supplies days ago for a beta fish but it’s too much for me and we’ll be moving soon so I got a lot of “great, more stuff to have to move” and I have also since realized I’m just not a fish person. I know long term I’m destined to forget to feed it! Also we have a kitten who is constantly trying to play and pick at it. It’s destined for disaster. So, I have literally everything you could need or want plus more. I didn’t know what I was doing so I bought everything and accidentally got two of some things just different kinds and filters and replacement cartridges and plenty of plants, decor, food, water enhancing/conditioning liquids, pumps, heaters, temperature monitors, air bubble things, you name it, I have it! I want to sell it though. And the pictures don’t show how beautiful it looks when done right and when nice and clean! I can’t seem to figure it all out and my kitten made me spill its food and so it doesn’t look clean.