If you don't know about databases then it would probably be much easier for you to use our package for SQL CE, because SQL CE is a simple file based database with nothing to install or configure, so it is much easier to get going.
See the article Using WebMatrix to Run the SQL CE Version of mojoPortal.
Then later if you decide you need a more robust database like SQL Server/SQL Express, there is a migration path.
Hope that helps,
Joe