What's stopping you? You don't even have to give up working in tech. I started learning joinery a year ago. I'm still terrible at it by professional standards,

What's stopping you? You don't even have to give up working in tech. I started learning joinery a year ago. I'm still terrible at it by professional standards, but I've made some bespoke furniture pieces for our house that would have cost 2-3x what I spent in tools and materials, and I enjoyed the process. It's definitely something you can do in your spare time, and even if you don't decide to go pro, you've still learned a valuable life skill.