Perhaps if you don't know how to code in vb.Net, a Hospital Management System is not the best first project. I suggest you get a copy of Sybex - Mastering Visual Basic 2010 by Evangelos Petroutsos. You might want to have a look at the free online msdn video series
before coding , i think it is better to analyise your proj , and requirements then start developing database then start coding. , you can find so many hospital management application on net tril version or demo versions , after testing them you can better analyise your application .