Simple WordPress job

Hi, I need someone to add a two custom fields where I can enter image URL's that will show up on top of the post, one after the other. The theme I'm using already inserts the featured image at the top of the post but I figure it's easier to remove that one from the post and use two custom fields instead because I also want the images to be clickable and lead to the full version image and the theme doesn't do that. I'm looking for someone who can get started right away. Thanks!