Download Oracle RDBMS (e.g. the free Oracle XE is based on 11g but includes most of the core PL/SQL packages and DBA tools I think) and start working through the free learning materials from Oracle.
No more Blub for me, thank you, Vicar.
That which doesn't kill us makes us stronger. I think a piece of pie wouldn't kill me. Tiny ad:
a bit of art, as a gift, the permaculture playing cards