Help about MOHAA (I have searched and read a ton of MOHAA threads)

I am sorry, but I am a newbie on computers and am trying to learn. Where do I go to find out what kind of a video card I have? What I could tell you is that I have an intel celeron (700 MHz) 256 ram; 15 Gigs and that is what I know aobut my comp. speed. Thank you so much for all your help.