If you're looking to start a cardio habit, the first step is to find an activity that you enjoy. This could be anything from running to biking to swimming. Once you've found an activity that you enjoy, the next step is to set some goals. For example, you might want to start by aiming to do 20 minutes of cardio three times per week. Once you've set your goals, the next step is to come up with a plan to help you reach them. This could involve signing up for a gym membership or finding a workout buddy to help keep you motivated. Finally, it's important to stick with it and be patient. It can take some time to develop a new habit, but if you stay consistent, you'll eventually get there.