Sorry, but this game isn't hard. Even you said it is only memorization. Also, I never once watched a video for any of the content and was able to do it fine.

On a note towards your issue, are you trying to do all this solo through DF or with a LS/FC. I can tell you that end game content in most any MMO is not meant to be done by random groups of people as it does take time and coordination and knowing who you are playing with benefits any group immensely.