Lastly, is there any way to fix the board that I have, or do I just need to buy a new one?
One other question. Is there a way for me to clean the board before soldering...?
I guess the soldering iron was too hot and it caused the metal on the board to fall off, so now there is nothing for me to solder the switch to.
I'd suggest you avoid the lead free solder. The leaded solder is far easier to work with and unless you eat the stuff it's not going to poison you.
So I am wondering if the solder pad that lifted off of the board, can be fixed
It just wobbles back and forth
I don't like the idea of using lead solder but I am going to try it... Since that it what everyone recommends.