Can you answer some aquarium questions?

If you have any fish stores in your area, you are better off asking for their advice before you purchase anything for the tank. A lot of the fish you listed will not get along with a fish of a different kind. Cichlids are not to be put in a tank with anything other than other cichlids, or they will chase your smaller fish, causing them stress and will also kill smaller fish. Cichlids get pretty big in size. Also, some of the fish you listed, such as Mollies, are live bearers, meaning they have live babies instead of laying eggs, and you risk the chance of the babies being eaten by the other fish. As for having an aquarium in your room, I have a 55 gal in my room and I love it...love the sound of the water, it puts me to sleep. As for getting a dark tank, do as I did, I spray-painted the back of my tank black, but you can also get a dark colored background to put on the back of the tank. As for the plants, some fish will eat live plants. You can use plastic, or what I prefer, silk plants. They are easier to maintain and the silk plants look life-like in the tank. You will also need to cycle the tank for at least 24 hrs before adding any fish. I would also add at least 2 cheap fish to cycle the tank to begin the bacteria that's needed for the fish's health, and I would cycle that for another 24 hrs. Or you can take your chance with the cheap fish by cycling the tank with them in it for the first 24 hrs.