i seriously need some help?

No Corys in a 10g sorry the bio-load (fish poop processed) in the tank is too much. They are schooling fish and need 6+ fish for a community. 20g is the smallest you can have some and that would only be panda Corys as they only grow 2 inches. Peppered and Bronze corys grow bigger than pandas.

Celestial Perl Dinos can be kept in a 10g. 5+ fish to see community behavior. A planted tank is suggested if you want to keep these fish.

Shrimp or Mystery Snails are fine. If you have too many shrimp though I would watch it. They are very sensitive to ammonia levels. Get APIs test kit to measure ammonia. If ammonia is more than 1ppm do a 50% water change with Prime. Mystery snails are only active in the night.

Do not get guppies the 10g is just too small if they reproduce you will have issues in that 10g. It is not only about fish compatibility, but about establishing an eco system. If you have too many fish and overcrowd your aquarium things won't get processed and your fish will die.

Ammonia is fish poop, un-eaten food, and other decay matter in the tank. When you have too much of poop or fish food piling in the bottom you will have a high concentration of ammonia thus ammonia can kill your fish. If the ammonia is not broken down by other microorganisms then your fish will always be in danger of having ammonia burns in their gills and having low immune systems. Having low immune systems they are more prone to diseases like dropsy, fin rot, and ick.

shrimp dont eat fish at all. in a ten gallon you could fit all those a few cory's and about 6 guppies additional. btw when it comes to guppies theirs a 2:1 ratio one male for every 2 girls. or all one sex. this causes a lot of stress in the tank if too many males and not enough females

The shrimp will most likely eat the guppies, not sure about the danios..

Its amagine