I just got a used Nikon D3200 from a friend and I am going to Chicago this Friday for a big trip. I really want to take those cool street photos of people and buildings but I only have the big zoomy lens it came with and its super bulky and heavy to carry around all day. Someone told me I need a prime lens but I dont even know what that means exactly lol. I think it means it doesnt zoom? I have like $150 maybe $200 max to spend and I need to buy it like today so it gets here in time. Is there a specific one that fits a Nikon that isnt gonna break my bank? Sorry if this is a total newbie question I just have no idea what I am doing...