It's custom and expected to wash your hands thoroughly before sitting down to enjoy your meal.
Eating is done only with your right hand, the left hand is considered dirty, as it's used for functions associated with the toilet.
First, eat the bread with some of the vegetable curries, what is left can be eaten alongside the rice, daal or sambar.
The side dishes add different tastes and textures to the food. Therefore, consume a little bit of what is provided along with the main dish.
Sample each separate dish to let its flavour profile be appreciated. Best not to mix the dishes into one morsel!
Be cautious of the quantity of daal you put onto the rice. Adding too much daal will make the rice sloppy, and it will be difficult to hold it together in your hand. Too little will make the rice sticky and bland.
South Indian meals are served traditionally on a banana leaf. Snacks like banana chips are put on the banana leaf first, and then the rice and the other dishes will be served. The food will include a spectrum of flavours, from sweet, sour, and bitter to savoury. After you have completed the meal, fold up your banana leaf in half.
If eating a thali, which is a platter with a variety of dishes in little bowls, dip little pieces of bread into the containers to eat the dishes.