How can i put this graphics card in?

yes, remove the left side of your computers case, when looking at the front of the case of course, towards the bottom of the motherboard, you'll see a few different coloured plastic slots, generally the longest one will be PCI-E most new boards they will be either, yellow, brown orange or blue possibly red, just remove the slot where it should go from the back of the computer place the card in, then screw it into place.