Ask HN: Dentist looking to switch to software engineering. Any tips?

I'm a 34-year-old dentist that is looking to completely switch careers to software. It is not because of the pay, it's just that I don't enjoy my job and I've always been fascinated with computers. I have saved up for two years' worth of living expenses and some extra savings to pay for schools or bootcamps. What do you recommend? Any books, schools, bootcamps? Thanks.