Could i lose weight by doing this?

Nikii Asked: Could i lose weight by doing this?

So i eat like :

cereal
banana

2x biscuits
bar

something for lunch ( sandwich ? )

another snack ( hot milo and 2x biscuits , oreos and milk , 4 x cheese and crackers ? )

If i get hungry again a piece of fruit or vege

dinner

Then for exercise i go for a 20min walk down a hill and then i jog around for about 30mins and then a 30 min walk back up the hill .

Im 13 and i weigh 51kgs i want to lose weight , will i get huge muscly legs ? if so how do i avoid this? And if i drank lots of water.
I just want to lose about 5 pounds or so …. so then how would i maintain it ?

When should i see results?

Im too young to diet and we dont have that much healthy food.