Hey, OP. While you wait for answers, here is a similar older question that have been answered by u/SOAR21

TLDR: Khan Academy can give you a good overview on certain historical topics but it‘s best to simply read well-written academic works.

https://www.google.com/amp/s/amp.reddit.com/r/AskHistorians/comments/430p5q/how_does_askhistorians_feel_about_khan_academy/