You can start walking more by making some tiny changes into your daily routine:

Take the stairs instead of the elevator
Walk to school or work
Go for a short walk after dinner or lunch with friends
Get off several bus stops before your destination when taking public transport
Always park your car a bit further and walk to the destination
Try walk-and-talk meetings at work
Take your dog for a walk
Listen to your favorite podcast and walk

15 Minutes of Walking On A Daily Basis Can Change Your Body Drastically - Higher Perspective