wrap one's head around

wrap one's head around - 1)взять в голову, осознать, понять, "допереть"

I'm still trying to wrap my head around the idea that I'm going to be a dad

2) погрузиться с головой
I'd like to wrap my head around some stimulus in the form of a good book, however, my brain is still trying to recover from the mundane work experiences .