Upper Radiator Hose is leaking? How difficult of a repair is this?

What is your question?

I recently had my car serviced for an ignition control module replacement. I noticed this morning that I had smoke coming from under my hood and a greenish fluid leaking. The engine temp wasn't off and the leak was on the driver side of the engine bay. I found a steady leak from my upper radiator hose. I found the part number at NAPA and can purchase it at NAPA for about $16. Is this a very difficult repair or can I perform this myself? I am a college student with absolutely depleted funds after my last repair. If I can fix it myself, I would prefer to do so but don't want to ruin everything on the same token. Thanks for your help!