Wear a covid n95 mask while soldering. Horrible stuff, lead. Melts really fast and flows great though. Solder in a well ventilated area. Tin the tip of the iron, there are Youtube videos which show you how - just keep piling on solder, wiping with wire wool, plunging it into cheapo plumber's flux, melting on solder etc. over and over again until the iron's tip is completely covered with a lovely shiny silvery layer. Makes things so much easier. Also clean the tip with wire wool while soldering. Wait for things to cool down after each solder.