'7 Little Johnstons': Liz Says She's 'Completely Nervous' for Daughter Leighton, 23 Months, to Start Swimming Lessons

'7 Little Johnstons': Liz Says She's 'Completely Nervous' for Daughter Leighton, 23 Months, to Start Swimming Lessons

The reality TV star welcomed her daughter with fiancé Brice BoldenTLC Liz and Brice's newborn getting swim lessons as the '7 Little Johnstons' stars watch onNEED TO KNOW7 Little Johnstons' Liz is "completely nervous" for her daughter Leighton to start learning how to swimIn an exclusive clip shared with PEOPLE ahead of the season 10 premiere, the proud mom and her fiancé, Brice, watch as their 23-month-old daughter has her first swimming lessonT…