FIRST LOOK: The Duggars Keep Family First Through Ups, Downs and Everything in Between in New 'Counting On' Preview

Jill and Jessa: Counting On, returns March 15 to TLC

The Duggar family’s official return to TV is almost here.

PEOPLE has the exclusive First Look at the first full season of TLC’s Jill and Jessa: Counting On, a continuation of the original three-part special Jill (Duggar) Dillard, 24, and husband Derick Dillard, 26, continue their missionary work with 11-month-old son Israel in Central America, Jessa (Duggar) Seewald and her husband Ben Seewald are adjusting to life as new parents to their baby boy Spurgeon, 4 months.

“Having the full 24-hour care of an infant – every diaper change, every feeding, it’s all on you,” Jessa, 23, says in the clip, while Ben, 20, alternates between changing diapers and hitting the sound booth with Flame, a Christian hip hop artist he “hit it off” with, much to Jessa’s amusement.

• For more on the Duggars’ lives these days, pick up this week’s issue of PEOPLE, on newsstands Friday

As she did during Counting On‘s three-episode special in December, Anna Duggar continues to open up about life in the wake of her harrowing year.

“I don’t know what I’m stepping into,” says Anna, 27 whose husband Josh admitted to cheating on Anna using the infidelity website Ashley Madison before checking into a faith-based rehab center in Illinois in August.

“I don’t know how to handle each situation,” Anna adds. “It’s not anything I ever would have thought I would walk through. [I tell myself,] ‘Just do the next right thing, have the next right response for the next 15 minutes.’ ”

The promo also features the younger members of the Duggar family building a (very large) treehouse, as well as sisters Jinger, 22, and Joy-Anna, 18, squirming away from questions about who will be the next one to enter in a courtship (the Duggar way of dating).

Counting On premieres March 15 (9 p.m. ET) on TLC.