You can lead some folks to knowledge, but you can not make them think.
The average person thinks he's above average!
For most folks, they don't know, what they don't know.
Good judgement comes from experience. Experience comes from bad judgement.
As a beginner, you might want to download and install free Oracle Database 10g Express Edition (XE) (all downloads and documentation can be found at Oracle Technology Network). Once you install the database, you'll probably want to immediately try it out (although you'd rather read the Concepts book) - therefore, start SQL*Plus, open SQL Reference book and - go ahead!
Note that Oracle is not a toy - it requires a LOT of reading and understanding its principles. If you want to quickly do "something", you might be disappointed and frustrated, so - I guess we'll see you here in the future. Good luck!