Step 1: Materials
Rosin core solder
Well ventilated area, outside is best
Moist sponge you won't use for anything else, because of the led in the solder
Step 2: Getting Started
Second make you have that moist sponge ready and plug that solder pen in, set the iron on the sponge or in its stand if you have one.
Third wait for the soldering pen (or iron) to be hot enough to melt the solder.
Last but not least, go ahead and melt the solder onto your item, reconnecting the broken connection or making a new one, do not worry if you are sloppy, just don't cross the connections, keep them separate.
And be safe, the fumes are toxic, and the soldering iron is hot DISCLAIMER I AM NOT RESPONSIBLE IF YOU INJUR YOURSELF OR OTHERS WHILE DOING THIS PROJECT SO DO NOY TRY TO PRESS CHARGES ON ME IF YOU ARE HURT I DID NOT TELL YOU TO DO THIS I SIMPLY TOLD oYOU HOW.
Step 3: Things to Keep in Mind
You are using EXTREMELY hot objects, do not touch the iron or solder unless you want to get burnt
Use common sense
And I am here to help you the best I can, so ask me something in the comments if you are confused
Feel free to let me know what you thought of this project in the comments.