Reliably making good solder joints without damaging the PCB or components isn't difficult, but is much easier if you understand the basic principles. While many videos on youtooob are verbose and a waste of time, there are a few which are informative, succinct and information dense. For soldering, that means describe and showing how to select a tip / temperature / wattage, where to place the tip and solder, and how to move them - and why.
Pace Basic Soldering Lessons 1-9 show good examples of what you should see happening when you've got it right - and just as importantly - wrong. The only omission is SMD components, presumably they weren't common when the videos were made.
But try not to snigger at the pronunciation of “solder”!