I was an idiot and let go of the door when a gust of wind forced it open...HARD..

It didn't hit anything but it bent the hinges, so now the door sags a bit and doesn't sit right. (it's over to the left about 1/4 inch more than it should be and it's scraping the fender)

How hard is it to do it myself and how much would it be to take it in?

Thanks.

It's the driver side door.

2000 Camaro.

I had my doors sagging too, recently. I went to a body shop and asked them to fix it. There were 2 options, re-allign the doors $40 a door
or new hinges was $100 per door, with labor included. I just had to have mine re-alligned, but if yours are bent, I would count on replacing the hinges with a minimum of $100.