Newbie question piaware setup


I have just set up a raspberry pi 3 with piaware. I purchased a basic rtl2832u usb tuner that came with a small antenna. At first i just want to get it working and I understand i need an outdoor aerial. I successfuly have it working and can access the skyview on my local ip address. Now i see no aircraft at all and it says it can see the receiver but not receiving data. It says about 0.2 messages a second obviously not working properly. And its only finding “other” not adsb or mlat readings. I even took my pi 3 outside and had the aerial on my roof but still the same terrible readings. Now would this be my antenna or my pi 3 not working properly? Just want to see what the cause is. Thanks for the help, be nice im new ! Lol!