Jason, When I first started out trying to solder electronics, I practiced on junk electronics, I would uninstall capacitors, diodes, switches, wires, etc. and then solder them back in place, improving technique and speed with practice. After a while you get better and faster and will find a temperature/ setting your comfortable with. For me I found setting 4 on my iron approx. 700 degrees allowed me to unsolder and resolder with out damaging/burning parts. I am by no means the best soldering person in the world, but have built up confidence to tackle a lot of soldering applications just by practice. The same with different tips, just experiment and you will find your favorite tip for different applications. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
Temperature Gun, Non-contact Digital Laser Infrared IR Thermometer can be found by google search if you desire knowing more precise what heat output on different settings are on your Weller WLC100.