I highly recommend anything in Finite Element Methods, it gives you an immediate grounding to a concrete application. I personally really benefitted a lot in th

I highly recommend anything in Finite Element Methods, it gives you an immediate grounding to a concrete application. I personally really benefitted a lot in the following YouTube lecture series: https://www.math.colostate.edu/~bangerth/videos.html https://www.math.colostate.edu/~bangerth/videos.html