Right first off your going to have to learn some server-side language, there are loads to choose from e.g. PHP, ASP, JSP, C++ (Cgi scripts) etc... That will be responsible for catching the form and 'doing stuff' with it.
Where are you planning on storing the information? Text file / database / xml documents etc... Again up to you, each method has it's own learning curve.
"[...] help me create a form that any person can fill out, but only an administrator can access, yet the form posts realtime. [...]" - What does this mean exactly?
If your looking to get this up and running quickly, then you'll have to either try and throw something together with a load of bugs and errors or you will need to outsource it. There's no way to do this properly in a short amount of time without the proper knowledge and experience.
“The best thing about a boolean is even if you are wrong, you are only off by a bit.”