Teaching myself to TIG weld. I worked as an electronics engineer for 30 years, most of them in a scientific research company. Worked with and designed a lot of high vacuum equipment with lots of pretty stainless and aluminum machining and welding. Always admired it. Towards the end I started doing 3D CAD design for my own experiments and really enjoyed it. My electronics job was slowly killing me although I still enjoyed building things and solving problems.
I tried my hand at something completely different, dog training, for a couple years but it avoided what I was good at.. building things.
Father was a woodworker so I picked up those skills too. Have a MacGyver gene in me for sure. Can make lots of things out of wood but somethings just aren't meant to be wood (cars, bikes, etc.).

that's about it. practicing. making mistakes. lurking on the forums.