To get certified in first aid, you can enroll in a course offered by recognized organizations such as the Red Cross, St John Ambulance, or other accredited training providers. These courses typically include both theoretical and practical components, and upon successful completion, you will receive a certification that is valid for a specified period.

First aid certifications typically need to be renewed every two to three years, depending on the certifying organization. It's important to stay up to date with your certification to ensure you are prepared to provide effective first aid in an emergency situation.