soldering is a way to join pieces of metal melting and then adding a filler metal (the solder) to the join the two pieces. There are many youtube guides for how to solder. You should also ask a friend. The soldering fumes are toxic and the solder is hot. Be careful. To solder, you need a soldering iron, a fan, and the solder. It is also useful to be able to remove any soldering mistakes.