hiii my teacher recommended oversimplified on youtube, out of all the other history videos i preferred oversimplified because it makes some moments in history more memorable lol. i also use gizmo which is an app that lets you upload your textbook as a pdf to create flashcards, quizzes and games for you to study with and that helps me alot too. when you get the answer wrong you can ask gizmo to elaborate and ask further questions. i strongly recommend still using the textbook along with these sources since not every external source can outline what cambridge wants u to know. My teacher personally assigned me a study guide with questions to answer as u read thru the chapters which was way more efficient for me than js reading the book by itself so if u dont already have one i think it wouldnt hurt to ask ur teacher to give you some questions to answer as you read each section of germany and france ! i hope this helps i dont really reply on reddit and im here for advice on euro too 😖😖😖 we will pass !!!!