Don’t worry, it takes a while for all of it to sink in, it’s a lot of information. I have watch course 2 or 3 times because I keep forgetting all the information, and every time I revisit a course after I have given it a little while to rest in my mind, when I watch it again the information is so much easier to understand and I absorb all the knowledge so much better. So don’t worry if you don’t understand it the first time, jump to another Fundamental’s course and come back to this one after a while.
