That’s cool and inspiring.
I would love start over (and finish) if I had the time. I’d aim for either a Physics or EE major.
I was once told (by someone very smart) that the day you stop learning is the day you start dying. I know it was a snide comment, but I took that to heart when I had to get a heart surgery. I was always worried that I couldn’t pay back the loan or that I would never recover the cost. My wife asked me what I had to loose.
Came down to why not?