Same for me. I was doing my PhD in another country and was just overwhelmed and disoriented at the sheer scale of information I suddenly had to remember and digest. Anki was on again/off again for me at first, but once I learned to edit and update the cards and add my own, I really began to understand how to boil concepts down into something I could remember, i.e. I could structure it to my own personal chaotic mode of thinking, and I've flourished with it since then