Rocket scientist (literally) retired. Started my career with Apollo 11 in the late 60s. I'm 72.
My chief hobby was wood carving and I became a master at it. I made my own tools, using stock removal, and became more interested in knives than wood.
Standard wood carving knives are BOOORing. So I started making custom knives with sculpted blades and exotic wood handles. Soon carvers wanted my custom knives so I started selling them.
My next challenge is forging carving blades including Damascus. These are small blades usually 2 to 3 inches at the most.
So far my total experience at forging is watching Forged in Fire so I have a lot to learn.