I’m applying to do a master’s degree next year, and the one I’m most interested in doing contains a mandatory course on quantitative analysis.

As somebody with no mathematical background and a bachelors degree in a humanities subject, how can I get a headstart and demonstrate willingness to learn intensely pre-application?

I am an incredibly fast learner but have no idea where to even begin with this and my mathematical knowledge stops at what was required for computer science A-level.