How can i lose the muffin top.? And get skinnier arms.?

Ok so im pretty happy with my body, but i do hate things about it like my stomach i have like a muffin top and i feel so embarrassed to wear my bikini cause it looks terrible with my muffin top and also i lost weight in my arms and now they are flabby how can i get the extra skin and fat off.? Can anyone tell me any good exorcises i can do at home to get rid of my muffin top and flabby arms.? Please help id like to look better before school starts.