I was recently asked to solder someones circuit board as I had steady hands.
Having done lots of soldering wanted to make sure I did it right and went to Youtube to get pointers from what looked like a 12 year boy at his mothers kitchen table.
Funnily he was an excellent tutor.
The main thing is to keep the soldering iron tip super clean.
Have a wet sponge handy and clean regularly. Heat from underneath and allow the soldering to melt into the wire.
The circuit board turned out good too.