Hey Kelly,
Yeah, it's a good DIY. Just be patient and take your time....and don't forget....safety first! (gotta add that one)
As for the CEL: if you do it Gary's way don't forget your radio code.
A second option would be to just go to your local Autozone or carparts store and have them reset it once you've completed your install. They will do it for free.
A third option would be to have a forum member close by help you out. Anyone out there willing to lend a hand??
A fourth option (as Iowa S suggested) would be to invest in an OBD II reader from flea bay and read/reset it yourself. I have not made that investment since my brother has one, so I just use his. But I know there's a few folks out there that can chime in to help you out with that purchase if you chose that route.
Good luck with that!
