A possible path of action for yourself.

a. Purchase a copy of the Developer Edition of SQL Server 2012 ... last time I checked AMAZON had it for $50 USA dollars.

b. Down load from

http://msftdbprodsamples.codeplex.com/releases

or http://msdn.microsoft.com/en-us/library/ms143221(v=sql.105).aspx

the sample database(s) for 2012.

c. Check here on SQL Server Central the STAIRWAYS articles.

d. Practice so you can learn enough T-SQL to be able to answer some reasonably difficult questions.