Cost: Not all online self-defense classes are free, so keep your budget in mind when researching the best online self-defense classes for you.

Class format: Consider whether having video assistants is important to you, or whether you prefer to read written self-defense training materials. Some courses rely heavily on written information, while others are more visual, offering images and videos that you can follow at home. You’ll also want to make sure the classes are appropriate for your level, Mann said. “If they are too high for you or too low, [it] can be demotivating and cause you to stop learning,” she says. “They should be enjoyable sessions.”

Instructors: Check the credentials of the instructors who created the online self-defense course you’re looking for. “Coaches have to have the necessary skills and learn on their own,” says Mann. You may also want to consider whether you are more comfortable learning techniques from a man or a woman. You should also think about your teaching style.

Duration: Some online self-defense classes don’t require much time, while others require a week-long commitment. When choosing the best course, keep in mind how much time you can devote to self-defense training.