Always keep learning!
You can’t know everything about something, it’s almost impossible and it IS impossible for something that continuously expands and grows, such as the realms of science fiction and fantasy.
As modern technology widens our perspective of what is real and what could theoretically happen, so do the genre aspects of sci-fi and fantasy get ever bigger. That is why I choose to rely not on my own narrow framework of what is possible within science fiction and fantasy, but of what the Writer’s Digest University online courses can teach me as well, by taking the world building course.
Of course, they have dozens of online courses going all year long, so if world building isn’t for you, check out the Copywriting course or Focusing on the Short Story. It’s personal and professional preference.