Unfortunately, I didn't have the chance to take a time series analysis course in grad school.
This repository contains some work following allong with Shumway & Stoffer's Time Series Analysis and Its Application with R Examples (Springer).
For more info (and a free download of the text), see the authors' site at http://www.stat.pitt.edu/stoffer/tsa3/. The pdf in this repo comes from there, with their license.