I'm really good when it comes to removing and inserting hardware. Although it depends on your motherboard and case.
These steps are on most motherboards:
1) Open your case
2) Find the screw or panel lock to unlock your GPU from the case.
3) If any, unplug power cables from GPU
4) Find the little lever to unlock your GPU from your motherboard (usually around the end of your GPU on the bottom)
5) Pull on the graphics card until it comes out!
Hope I was a help, good luck!