You can prevent shin splints when training for your first 5K, by gradually increasing mileage, like adding 10% weekly, and run on soft surfaces, such as park trails. Wear supportive shoes, and stretch calves daily in your living room. Strengthen shins with toe raises at home, ice after runs to reduce inflammation, and rest if pain starts, maybe relaxing with a book in your cozy nook, to keep your training on track.