Create Reels for Instagram

Hi, I am looking to have a few reels created for a walking and water challenge that I run monthly. I have an Instagram account and a few images that can be used but have no idea how to create reels. Can you help? Here are my FB page - https://www.facebook.com/sharon.bailie.9 Linkedin https://www.linkedin.com/in/sharon-bailie-6474625/ Instagram https://www.instagram.com/sbailie/