One option would be to start from what you already know–there are many opportunities to apply CS to life/physical sciences problems. I like rosalind.info, you can start with code and then read independently to fill in any gaps in your knowledge that you come across.
Tbf, I am less worried about CS (I already do a lot of technology stuff to solve my IRL problems, not necessarily coding related either - media servers and such), but more about other sciences.
Reading Asimov's essays and a Brief history by Bryson etc have left me a desire to learn more.
