Hey there,
I am late to reply but I’ve done this a few times and figured some things out. I add a little all purpose flour to my whole purpose flour while making the atta. I’ve found that it gives some stretch to the atta and makes rolling out much easier. Another tip, when you initially roll out the disk to stuff the paratha, make the center thicker than the outside(by applying less pressure to the center and more to the outside). Now when you roll the paratha out, you’re able to roll the paratha without it breaking too much and sticking to your rolling pin. Be sure to also dust your paratha at least twice when you’re rolling it out. Good luck!