The online course is not easier than the offline ones. In fact, it is more demanding because you have to be better organized, manage your time wisely, stay engaged in assignments and class activities despite not being in a physical classroom.
The nature of online learning requires the instructor and students to follow a certain set of guidelines, norms, and rules designed to make the learning process more comfortable, accessible, and effective.
A network etiquette, or netiquette, is a set of guidelines for faculty and students' online communication. Here is a netiquette of University of Florida which is a good summary of what netiquette should include. Please, acquaint yourself with it and try to stick to it. It contains a generic list of policies/rules students should follow while taking an online course.