Personally, I think that there are nothing hard to take care about it. The most important point is to do everything regular, especially cleaning and of course feeding. Hope that how to feed fishes you understand, but with cleaning usually there are difficulties. I recommended you to use special cleaners for fish tanks and to what some tutorials on youtube, how to do it correctly, because there are a lot of nuances. I have made a lot of mistakes in the beginning, I even have found fireworms in corals. However, it could be avoided by cleaning.