If I see endorsement for such things here it just amuses me and make me sad. Such things as soldering need proper scholarship, not a youtube video. You must attend some sort of real courses with a teacher and equipment and play on with things, there are electronics circles everywhere ...
Knowing how to solder was once a skill reserved for technicians, mostly those who worked with computers of some sort. Things are much different now, and soldering courses have been commonplace in school curriculum the world over. Still, that doesn’t mean that the majority could end up with ...