Bad news I'm afraid, but you did ask and we do all care about your fish so honesty is better. I know the fish are very small, but they will (or should if healthy) grow, and some of these get very large indeed, not to mention that some of them are shoaling species which need a group of their own or they will be stressed and can get very aggressive.
I agree with Salty&Onion to return/re-home the angelfish, kissing gourami, yo you loaches. All of these get far too large for this tank, plus they have real aggressive issues and/or need a group.
The rest of the fish might work, but not together, so here we come to the water parameters. These are GH (general hardness), KH (carbonate hardness also called Alkalinity), pH and temperature. The latter you can obviously control, but you have fishes with some very specific temperature requirements. The GH is the most important of the others, and you have fish that must have moderately hard or harder water and fish that need soft to very soft water. The GH you might be able to ascertain from your municipal water authority, check their website. The KH we can leave for the present, it is the GH that is crucial, and the pH will likely be related to the GH. Some of the fish (aside fro those already mentioned as too large/aggressive) will have to be returned, but we need to know the parameters first.
I'm sure you wold not want to be taking out dead fish periodically, so sorting the above out will help prevent that.