Deborah, first off, I and welcome to Tropical Fish Keeping; I see you recently joined.
Second, Dawn has given you good advice, and I concur.
Third, we have a Fish Profiles section on this forum, you can go there by clicking on "Tropical Fish Profiles", second from the left in the blue bar across the top. Also in all posts, if the name of a fish or plant that is in our profiles is replicated exactly, whether common name or scientific, the name will appear shaded and you can click on that to see the profile.
We have a lot of fish profiles and are adding more, so this is a good resource right here on the forum. Each profile contains information on water parameters, numbers, tank size, fish size, compatibility, and background.