Maruti New Model My Maruti 800 2002 Model Gives 12 Kms/ltr Milege In City. I Am New To Driving , 2 Months Old.?

My Maruti 800 2002 Model Gives 12 kms/ltr milege in city. I am new to driving , 2 months old.? - maruti new model

My Maruti 800 2002 model are 12 km / Miłego DRC in the city. I'm going again, 2 months. How can I improve performance? What am I doing wrong while driving? or there is another problem in May? What to expect reasonable kilometers in the city?