Rice flour should be smooth and not coarse in texture. Get it milled if you do not find a smooth textured rice flour. Be wary of store bought rice flour, some brands do mix maida or refined flour
If dough feels sticky add half a tsp of oil and then knead the dough
Resting the dough for 5-10 minutes is very important, it makes rolling the rotis easy
When rice flour is added to boiling water do so quickly and make sure to simmer it, to avoid hot water splashing on your hands
Do NOT mix the rice flour as soon as it is added to water this will create lumps
Add warm water a few drops at a time while kneading the dough, this gives a chance for the flour to absorb water before more is added
Lightly oil the belan/rolling pin before rolling rotis, you could use your fingers to press it into a roti as the dough will be quite soft
Use light hands while rolling rotis, do not exert a lot of pressure on the rotis