Not very sure what to do after that. Would really appreciate any guidance in this direction, or if there is a better/efficient way to go about gathering solid applicable knowledge in this area. Want to acquire solid finance foundations, so as to be able to implement the complex financial processes & systems (like marketplaces, securities & OTC instrument contracts, trading bots, etc.) on my own.
Additional background info if it helps: Current skill sets I have: Economics & Stats (MS level knowledge) | R, SAS, Stata, MATLAB, etc. (2 years as data science guy) | Python (2 years as full stack dev); basic Java (coding challenges level only) | Also good college level calculus, linear algebra, basic optimization techniques etc. so won't shy away from complex Maths.