What to do?
There’s a pithy saying: ‘If in doubt, don’t!’ That is the safer way to play it, especially if it comes to working with electricity as you may have discovered. Rewiring a house is a job for a trained electrician and not for a willing amateur! The opposite approach is taken by some with likely dire consequences: ‘If in doubt, do!’ If you look at the bigger picture of ‘do’ and ‘don’t’, everyone needs something to do.