Based on your personal experience, how may someone enter a completely new research area as a 3rd-year Ph.D. candidate? Is it better to start with reading journal papers? Or maybe taking some courses? Or watching YouTube videos? Or what?! I am basically looking for the most efficient/fastest way of doing this!
And if you want to know my story, I am a Ph.D. candidate in structural engineering with a focus on deterministic earthquake modeling, but for some reasons now my advisor wants me to start working on probabilistic modeling of hurricanes and floods using machine learning methods, and I am a little paranoid because I have no idea about any of these! So what are your suggestions?!