I have a Korg GA-30 tuner but dont know how to use it to help me get drop c tuning
I read on a website that if I hold down the twelveth fret on the six string
I could get it to sound like the fourth string for drop d tuning

It worked on the tuner it read the 6th string as 4D
but i can find a website that tells me how to use my tuner to get drop C tuning on all strings.

JUST TO LET YOU KNOW I GOT MY GUITAR FOR CHRISTMAS, BUT JUST NOW GOT SERIOUS WITH IT.
                                                             
                                                                 YOU GOT EXPLAIN IT TO ME LIKE A IDIOT

                                                                              ALL I KNOW IS CHORDS SO FAR

I do not have a tuner like yours but I can let you know how to tune the guitar to Drop C.

To get Drop C Tuning from Standard Tuning, it would be as follows:

Standard                  Drop C

Top 6th E                      C
      5th A                      G
      4th D                      C
      3rd G                      F
      2nd B                     A
Low 1st e                      D

Here are how to play some power chords in Drop C:

D|-------------------------------------------------------------------------------
A|-------------------------------------------------------------------------------
F|-------------------------------------------------------------------------------
C|-----0-----1-----2-----3-----4-----5-----6-----7-----8-----9-----10-----11-----12
G|-----0-----1-----2-----3-----4-----5-----6-----7-----8-----9-----10-----11-----12
C|-----0-----1-----2-----3-----4-----5-----6-----7-----8-----9-----10-----11-----12

         C      C#   D      D#    E      F       F#    G     G#    A       A#     B         C