Balancing My Many Career Interests

I have so many interests I want to do them all as a career!! Hello, I am 18 and got accepted into a STEM school of my dreams for the Fall. I am stoked! I have very particular interests and many of them, but even though people say “you can do it ad a hobby” i know I have so much passion for them I don’t think that’s possible. It depends on the day since my interestes rotate. Right now, I am looking at bioengineering for my degree, and space science for a minor since I want to combine the two to help astronauts and people live in space. However I have also a profound interest in geology, maybe planetary geology, and I know I have time to decide but I would love it if I could combine things or do both or whatever. Anyone with special interests and autism also struggle with switching interests? Mine vary a lot, I have so many it’s hard to balance or keep just one at a time.