Hello everyone,  I have recently started my PhD in Epidemiology and have been interested in complex systems dynamics for a while. My background is in public health and biostatistics. I took an introductory summer course three years ago in complex systems. However, I was wondering if anyone has a recommendation in what courses should I take to embed myself in the field. I have experience in R programming and other statistical softwares, so I do not know if I should start first by getting acquaintance with the programming part or it, or if I should take a course that focuses more in the theoretical aspects of complex systems first.    Thanks and best,    César