Chukwu:
# I am a new timer into the DBA (Oracle) world.
No such thing unfortunately ... becoming an Oracle DBA and getting
hired as one takes many years.
# Ive been trying to setup 11g db on my PC to no avail.
Jeffrey Hunter has a whole bunch of excellent set it up articles ...
all the steps ... all the details ...
http://www.idevelopment.info
Click the oracle link on left hand side and ( very carefully ) choose
one of the setups that makes sense to you.
A machine running XP won't cut it probably ... lots of
alternatives ... could put up a vm under virtual box and then run
linux on that ...
Make sure you match your machines operating system and requirements to
what Jeffrey lists as pre-requisites for the option you select.
Have fun!