This breathing practice was shared with me recently and it's been a go-to for me. You can approach this by just counting the breath, or you may choose to add in visualizations- like the chakras- as you practice.
By the way, if you think this tiny cabin I'm at is cute - you can enjoy some #freetime and stay at one too! Getaway is now offering a friends and family program so if you'd like to stay for a discounted rate, send me a message. They have a location in Asheboro for local folks as well as places across the country.