My late friend Ward was a strong supporter of Build-a-Blinkie[1] and their mission to teach people to solder by doing.

My friend Jim's been soldering since the 1950s. We solder a lot of things with leads, for this, his method is to get each item to be joined tinned, then use solder as a mechanical joint. Melt in the solder, remove the iron but hold them together, then once cool, tug on the joint to make sure it holds.

[1] https://build-a-blinkie.org/events.php