When rolling out the dough keep enough flour under your flatbread, but not too much either, just enough to not stick. Use a small rolling pin too. If you are new to this, just roll out the dough a little and turn it each time so that you slowly have a round circle-shaped. In time you get the hang of this and eventually you will see that when rolling out the flatbread dough with some flour underneath, that the roti circle starts to move a little always towards the right. And so you can create effortlessly round shapes.