Two things that pop out in my mind, Information Technology and Engineering. Those two are closest to your dream of becoming a blockchain enthusiast. It's not that it is the ticket of becoming one. Everyone can learn blockchain even if you don't have formal education. That's the best thing about now - everything is readily available. You just need to have courage to pursue them.
I'm starting Java now, maybe it's too late but it's a good start for me.
Good for you. I am not planning to get into coding now but it would be really nice for others to know how they want to plan ahead.