I learned to program on a BBC Micro when it was new. I built my first computer from scratch a couple of years later; I read the datasheets, bought the chips, wired them by hand and wrote a simple OS and Floppy controller. Built not assembled
Since then the majority of my career has been about software although I still dabble in electronics at home. My main hobby is learning. If you learn only one thing in life, learn to get pleasure from learning.