If only it was that easy.
I'm afraid simply adding all your current fish to a newly cycled tank would be a bad idea. You see, you need to let your biological filtration build up slowly. So it would be best to add the fish slowly over a long period of time.
You have some heavy hitters there too. By heavy hitters I mean very demanding on your bio-load, which is the amount of waste your biological filtration can handle. If I were you I would try to return your fish, cycle the bigger tank with some Danios as suggested, and then start stocking the tank SLOWLY with smaller fish, like rasboras, or various tetras. Once the tank stabilizes with those, and the you build a decent biological filtration, you can slowly add more fish. After you add new fish, it is good to check your water parameters. And by that I mean by picking up a master liquid test kit, and testing for Ammonia, Nitrite, and Nitrate. When you add new fish, you may see a rise in ammonia and nitrates, which is normal. But it is the time given to let your biological filtration catch up with this new demand until you start to see it stabilizing. By that I mean absolutely no traces of Ammonia or Nitrite, and a Nitrate reading of under 40ppm. I usually wait at least a month after I add new fish to add anything else, but the test results will be your best call.
Let me know if you have any questions. And I'm sure other people here can help steer you in the right direction for types of fish to start off with.