Bitcoin mining, forget about it. U can but itll take 1000 years give or take for ur pc to make 1 btc... (like other dude said u need asic miner for that)
There are however more then enough other coins you could choose from and then change for bitcoin (if youd want that) But again AMD cards work best there. But even for nvida there is still hope. U could mine Protoshares for instance. (difficult to set up tough) Either way with mvida u need program
CudaminerFrom the looks of it your current pc is good to get started.. You wont make much currency-wise, but you gain massive amount of knowledge.
Easiest to start is simply to try. Pick a coin ... good place to search is
coinwarz.com search for mining pool for that coin, and follow instructions on pool website till you get it working. Thatll be first obstacle. Just getting it to work. Gets easier after that =)
Best of luck on starting. and if you have any more questions, there are like a mil people here with a bil times more knowledge then me
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
so there is enough help