Replacing shutoff valve (toilet supply) on metal pipe
First post here from a new home owner, thanks in advance for any responses.
I am on to my second bathroom redo, this one is giving me some pause. When I tried to shutoff the water supply to the toilet, I was initially dismayed at finding that the valve handle was plastic. Then I was further disheartened when I could not fully shutoff the flow of water. I removed the valve handle to find that even the piece connected to the handle was plastic. I tried using a wrench to grip the plastic and turn it tighter, but can't get too crazy or I will just destroy the plastic.
I would like to replace this shutoff valve with another one (not plastic this time). The pipe is metal, it appears to me to be of the color of galvanized pipe I think... I'm pretty sure I have copper inside the walls. I'm hoping if this is the case that the joints are done properly to resist corrosion.
The pipe coming out of the wall appears as if it has an inner and outer pipe, (diameter gets slightly larger about 3/4" to 1" from the wall).
I don't have any real plumbing experience that involves cutting pipes, etc. I'm willing to buy the right tools if it's not too expensive, and glad to have the learning experience.
Hopefully this link to the picture of the pipe works:
Pic of pipe