hi totmaster I see this is your first post here, and you have not had any replies so far so I'll give it a try...
In general the people on this forum are very helpful if you ask well defined questions and are willing to do the work.
I know that if you have little experience things can be a bit overwhelming, especially in robotics where so many fields (mechanics, electronics, programming) come together, but don't let this put you off!
What you need to do is first make an overview of what it is you want your system to do, I'm guessing it is something like:
if IR sensor detects object: move servo left
otherwise: move servo right
Once you know exactly what it is you want your system to do, read into servo's. What makes the move left, what makes them move right?
Then get to know your arduino. I remember when I first used it they had some tutorials involving a blinking LED, that should give you a good base to drive your servo. And no, I'm not telling you why. You have to be willing to do the work remember? Just tinker around, I'm sure you'll find it to be worth the effort!