You say you raised the fish from a fry in parantheses, so that would make it how big exactly? Any description you can give us so we can help you id it?
Is the tank cycled? Even if it is, don't buy too many fish at once, in case the bio load is more than the bacteria in your tank can handle.
Corydoras are excellent fish to add, though you will have to feed them wafers, pellets, and other special foods.
Before you start to put in fish, could you give us an idea of the type of community you would like to have in your tank? I.e. fast/colorful/big/etc. fish? That would definitely help us offer you some suggestions.