2002 altima

I have recently purchased a 2002 Nissan Altima in good condition, but would like to do some fairly inexpensive work to sharpen it up and repair some dings. Ideally I would need new side view mirrors, door handles, and a new front bumper cover (or perhaps a whole kit). I would like it to look...

I was taking off the alternator and the power cable touched the metal of the alternator and caused a spark. put it all back on and now the car wont start. Nothing turns on the car. its like if the battery was dead but i know its not. i dont know what is going on. Its a 2002 Nissan Altima 2.5 L