CS person with biology PhD here. The mix of biology and computation is huge, and with the right skill set, interdisciplinary unicorns make tons of money. If you want to see how computation and biology mix, first dive into a standard university Intro Biology course, and then with that foundation, look into computational biology & bioinformatics (they're distinct). You'll find that genomics is only one piece of a much bigger and absolutely fascinating story.

To get that basic biology foundation, another post mentioned an EdX Intro Biology course, that would be a terrific start, or just get a recent university-level intro biology textbook. It's not terribly difficult material and you'll be in far better shape than reading a biology-for-laypersons pamphlet.