Will i lose weight like this ?

iam trying to lose weight now so that is wat i ate today ... a plate of salad .. 2 eggs... some meat and i drank like 4.5 liters of water or somthing and did some exercise for 20-30min ...is this good do i need to increase the food ? or the exercise time its really hard for me since iam in bad shape my family is saying that iam starving myself like this (btw iam a guy and iam 18 )