Whether you use a simple dry box with silica gel or a electrical dry cabinet is up to you. Here is a nice article about the common types of dry cabinets. In addition, a dry cabinet also serves as a common storage for all gears (e.g. filter). Keeps it tidy.
No need to panic, get something within the next weeks after you got your cam and you are fine. Also, the best way to prevent fungus is using your gear and exposing it to sun.