Hi, this course is intended for absolute beginners so a successful student would be able to read and understand python codes and write python programs on their own.
For 2, you could try writing codes in multiple platforms as you learn along. But this book might not help you directly build projects. It will help you learn programming and that's about it. For Javascript, you'll probably need to learn ES6/ES7 and then hop on a framework of your choice and learn that.