I'm seeking advice on the leak in the picture above. The cold water side apparently was crimped/welded instead of capping or just using a proper elbow fitting. Now it's leaking profusely. I have zero experience messing with copper plumbing but I'm always willing to try most stuff around the house.
Should I attempt to to remove this fitting and put in an elbow? Should I just see if I can pull the small crimped length of pipe and replace it and cap it properly?
My biggest concern is starting it and not being able to turn my water back on if I completely fail.