What kind of math course should I take if I want to learn about fractals?

I am not the kind of person that one might say has a head for numbers, but I have lately found fractals to be intensely fascinating after discovering their presence in the structure of a novel.

I’m a college student. Here are the options:

—Elementary Functions and Analytic Geometry
—Math and Calculus Applications for Life and Social Sciences [doubtful]
—Introduction to Linear Algebra
—Discrete Mathematics [doubtful, but seems interesting]
—Elementary/ Differential Equations
—Abstract Algebra
—Complex Analysis [this seems to be maybe the most relevant]

I’d be auditing the course because there’s no way in hell I’d manage an A in math, but I’m really interested in fractal geometry.

So, which of these should I pursue? Your help is appreciated.

Also, if you have any book recommendations regarding fractal geometry, especially if it’s related to Wacław Sierpiński and/ or infinite recursion, I’ll take that, too.