Take a look at what you eat... Fast food, sugar cereal, whole milk and anything high fat goes out the window..
I am taller and older and was heavier than you. I started simple, no more soda or sugar in my coffee and added diet ice tea.
Then moved on to no Pizza, Strombolis, Cheese steaks, hoagies,Ribs and fried foods..
Also take it slow, not too many changes at once. The weight will come off. Don`t beat yourself up if you slip just get back to it.. You must EXERCISE to maintain musle...